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/*
example.js
 
quickstart example
 
instruction
    1. save this script as example.js
    2. run the shell command:
        $ npm install npmtest-react-test-renderer && PORT=8081 node example.js
    3. play with the browser-demo on http://127.0.0.1:8081
*/
 
 
 
/* istanbul instrument in package npmtest_react_test_renderer */
/*jslint
    bitwise: true,
    browser: true,
    maxerr: 8,
    maxlen: 96,
    node: true,
    nomen: true,
    regexp: true,
    stupid: true
*/
(function () {
    'use strict';
    var local;
 
 
 
    // run shared js-env code - init-before
    (function () {
        // init local
        local = {};
        // init modeJs
        local.modeJs = (function () {
            try {
                return typeof navigator.userAgent === 'string' &&
                    typeof document.querySelector('body') === 'object' &&
                    typeof XMLHttpRequest.prototype.open === 'function' &&
                    'browser';
            } catch (errorCaughtBrowser) {
                return module.exports &&
                    typeof process.versions.node === 'string' &&
                    typeof require('http').createServer === 'function' &&
                    'node';
            }
        }());
        // init global
        local.global = local.modeJs === 'browser'
            ? window
            : global;
        // init utility2_rollup
        local = local.global.utility2_rollup || (local.modeJs === 'browser'
            ? local.global.utility2_npmtest_react_test_renderer
            : global.utility2_moduleExports);
        // export local
        local.global.local = local;
    }());
    switch (local.modeJs) {
 
 
 
    // init-after
    // run browser js-env code - init-after
    /* istanbul ignore next */
    case 'browser':
        local.testRunBrowser = function (event) {
            Eif (!event || (event &&
                    event.currentTarget &&
                    event.currentTarget.className &&
                    event.currentTarget.className.includes &&
                    event.currentTarget.className.includes('onreset'))) {
                // reset output
                Array.from(
                    document.querySelectorAll('body > .resettable')
                ).forEach(function (element) {
                    switch (element.tagName) {
                    case 'INPUT':
                    case 'TEXTAREA':
                        element.value = '';
                        break;
                    default:
                        element.textContent = '';
                    }
                });
            }
            switch (event && event.currentTarget && event.currentTarget.id) {
            case 'testRunButton1':
                // show tests
                Eif (document.querySelector('#testReportDiv1').style.display === 'none') {
                    document.querySelector('#testReportDiv1').style.display = 'block';
                    document.querySelector('#testRunButton1').textContent =
                        'hide internal test';
                    local.modeTest = true;
                    local.testRunDefault(local);
                // hide tests
                } else {
                    document.querySelector('#testReportDiv1').style.display = 'none';
                    document.querySelector('#testRunButton1').textContent = 'run internal test';
                }
                break;
            // custom-case
            default:
                break;
            }
            Iif (document.querySelector('#inputTextareaEval1') && (!event || (event &&
                    event.currentTarget &&
                    event.currentTarget.className &&
                    event.currentTarget.className.includes &&
                    event.currentTarget.className.includes('oneval')))) {
                // try to eval input-code
                try {
                    /*jslint evil: true*/
                    eval(document.querySelector('#inputTextareaEval1').value);
                } catch (errorCaught) {
                    console.error(errorCaught);
                }
            }
        };
        // log stderr and stdout to #outputTextareaStdout1
        ['error', 'log'].forEach(function (key) {
            console[key + '_original'] = console[key];
            console[key] = function () {
                var element;
                console[key + '_original'].apply(console, arguments);
                element = document.querySelector('#outputTextareaStdout1');
                Iif (!element) {
                    return;
                }
                // append text to #outputTextareaStdout1
                element.value += Array.from(arguments).map(function (arg) {
                    return typeof arg === 'string'
                        ? arg
                        : JSON.stringify(arg, null, 4);
                }).join(' ') + '\n';
                // scroll textarea to bottom
                element.scrollTop = element.scrollHeight;
            };
        });
        // init event-handling
        ['change', 'click', 'keyup'].forEach(function (event) {
            Array.from(document.querySelectorAll('.on' + event)).forEach(function (element) {
                element.addEventListener(event, local.testRunBrowser);
            });
        });
        // run tests
        local.testRunBrowser();
        break;
 
 
 
    // run node js-env code - init-after
    /* istanbul ignore next */
    case 'node':
        // export local
        module.exports = local;
        // require modules
        local.fs = require('fs');
        local.http = require('http');
        local.url = require('url');
        // init assets
        local.assetsDict = local.assetsDict || {};
        /* jslint-ignore-begin */
        local.assetsDict['/assets.index.template.html'] = '\
<!doctype html>\n\
<html lang="en">\n\
<head>\n\
<meta charset="UTF-8">\n\
<meta name="viewport" content="width=device-width, initial-scale=1">\n\
<title>{{env.npm_package_name}} (v{{env.npm_package_version}})</title>\n\
<style>\n\
/*csslint\n\
    box-sizing: false,\n\
    universal-selector: false\n\
*/\n\
* {\n\
    box-sizing: border-box;\n\
}\n\
body {\n\
    background: #dde;\n\
    font-family: Arial, Helvetica, sans-serif;\n\
    margin: 2rem;\n\
}\n\
body > * {\n\
    margin-bottom: 1rem;\n\
}\n\
.utility2FooterDiv {\n\
    margin-top: 20px;\n\
    text-align: center;\n\
}\n\
</style>\n\
<style>\n\
/*csslint\n\
*/\n\
textarea {\n\
    font-family: monospace;\n\
    height: 10rem;\n\
    width: 100%;\n\
}\n\
textarea[readonly] {\n\
    background: #ddd;\n\
}\n\
</style>\n\
</head>\n\
<body>\n\
<!-- utility2-comment\n\
<div id="ajaxProgressDiv1" style="background: #d00; height: 2px; left: 0; margin: 0; padding: 0; position: fixed; top: 0; transition: background 0.5s, width 1.5s; width: 25%;"></div>\n\
utility2-comment -->\n\
<h1>\n\
<!-- utility2-comment\n\
    <a\n\
        {{#if env.npm_package_homepage}}\n\
        href="{{env.npm_package_homepage}}"\n\
        {{/if env.npm_package_homepage}}\n\
        target="_blank"\n\
    >\n\
utility2-comment -->\n\
        {{env.npm_package_name}} (v{{env.npm_package_version}})\n\
<!-- utility2-comment\n\
    </a>\n\
utility2-comment -->\n\
</h1>\n\
<h3>{{env.npm_package_description}}</h3>\n\
<!-- utility2-comment\n\
<h4><a download href="assets.app.js">download standalone app</a></h4>\n\
<button class="onclick onreset" id="testRunButton1">run internal test</button><br>\n\
<div id="testReportDiv1" style="display: none;"></div>\n\
utility2-comment -->\n\
\n\
\n\
\n\
<label>stderr and stdout</label>\n\
<textarea class="resettable" id="outputTextareaStdout1" readonly></textarea>\n\
<!-- utility2-comment\n\
{{#if isRollup}}\n\
<script src="assets.app.js"></script>\n\
{{#unless isRollup}}\n\
utility2-comment -->\n\
<script src="assets.utility2.rollup.js"></script>\n\
<script src="jsonp.utility2._stateInit?callback=window.utility2._stateInit"></script>\n\
<script src="assets.npmtest_react_test_renderer.rollup.js"></script>\n\
<script src="assets.example.js"></script>\n\
<script src="assets.test.js"></script>\n\
<!-- utility2-comment\n\
{{/if isRollup}}\n\
utility2-comment -->\n\
<div class="utility2FooterDiv">\n\
    [ this app was created with\n\
    <a href="https://github.com/kaizhu256/node-utility2" target="_blank">utility2</a>\n\
    ]\n\
</div>\n\
</body>\n\
</html>\n\
';
        /* jslint-ignore-end */
        Iif (local.templateRender) {
            local.assetsDict['/'] = local.templateRender(
                local.assetsDict['/assets.index.template.html'],
                {
                    env: local.objectSetDefault(local.env, {
                        npm_package_description: 'the greatest app in the world!',
                        npm_package_name: 'my-app',
                        npm_package_nameAlias: 'my_app',
                        npm_package_version: '0.0.1'
                    })
                }
            );
        } else {
            local.assetsDict['/'] = local.assetsDict['/assets.index.template.html']
                .replace((/\{\{env\.(\w+?)\}\}/g), function (match0, match1) {
                    // jslint-hack
                    String(match0);
                    switch (match1) {
                    case 'npm_package_description':
                        return 'the greatest app in the world!';
                    case 'npm_package_name':
                        return 'my-app';
                    case 'npm_package_nameAlias':
                        return 'my_app';
                    case 'npm_package_version':
                        return '0.0.1';
                    }
                });
        }
        // run the cli
        Eif (local.global.utility2_rollup || module !== require.main) {
            break;
        }
        local.assetsDict['/assets.example.js'] =
            local.assetsDict['/assets.example.js'] ||
            local.fs.readFileSync(__filename, 'utf8');
        // bug-workaround - long $npm_package_buildCustomOrg
        /* jslint-ignore-begin */
        local.assetsDict['/assets.npmtest_react_test_renderer.rollup.js'] =
            local.assetsDict['/assets.npmtest_react_test_renderer.rollup.js'] ||
            local.fs.readFileSync(
                local.npmtest_react_test_renderer.__dirname + '/lib.npmtest_react_test_renderer.js',
                'utf8'
            ).replace((/^#!/), '//');
        /* jslint-ignore-end */
        local.assetsDict['/favicon.ico'] = local.assetsDict['/favicon.ico'] || '';
        // if $npm_config_timeout_exit exists,
        // then exit this process after $npm_config_timeout_exit ms
        if (Number(process.env.npm_config_timeout_exit)) {
            setTimeout(process.exit, Number(process.env.npm_config_timeout_exit));
        }
        // start server
        if (local.global.utility2_serverHttp1) {
            break;
        }
        process.env.PORT = process.env.PORT || '8081';
        console.error('server starting on port ' + process.env.PORT);
        local.http.createServer(function (request, response) {
            request.urlParsed = local.url.parse(request.url);
            if (local.assetsDict[request.urlParsed.pathname] !== undefined) {
                response.end(local.assetsDict[request.urlParsed.pathname]);
                return;
            }
            response.statusCode = 404;
            response.end();
        }).listen(process.env.PORT);
        break;
    }
}());
 
 

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/* istanbul instrument in package npmtest_react_test_renderer */
/*jslint
    bitwise: true,
    browser: true,
    maxerr: 8,
    maxlen: 96,
    node: true,
    nomen: true,
    regexp: true,
    stupid: true
*/
(function () {
    'use strict';
    var local;
 
 
 
    // run shared js-env code - init-before
    (function () {
        // init local
        local = {};
        // init modeJs
        local.modeJs = (function () {
            try {
                return typeof navigator.userAgent === 'string' &&
                    typeof document.querySelector('body') === 'object' &&
                    typeof XMLHttpRequest.prototype.open === 'function' &&
                    'browser';
            } catch (errorCaughtBrowser) {
                return module.exports &&
                    typeof process.versions.node === 'string' &&
                    typeof require('http').createServer === 'function' &&
                    'node';
            }
        }());
        // init global
        local.global = local.modeJs === 'browser'
            ? window
            : global;
        // init utility2_rollup
        local = local.global.utility2_rollup || local;
        // init lib
        local.local = local.npmtest_react_test_renderer = local;
        // init exports
        if (local.modeJs === 'browser') {
            local.global.utility2_npmtest_react_test_renderer = local;
        } else {
            module.exports = local;
            module.exports.__dirname = __dirname;
            module.exports.module = module;
        }
    }());
}());
 
 

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1
 
 
 
 
 
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1
 
 
 
 
 
 
1
 
 
 
 
 
 
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/* istanbul instrument in package npmtest_react_test_renderer */
/*jslint
    bitwise: true,
    browser: true,
    maxerr: 8,
    maxlen: 96,
    node: true,
    nomen: true,
    regexp: true,
    stupid: true
*/
(function () {
    'use strict';
    var local;
 
 
 
    // run shared js-env code - init-before
    (function () {
        // init local
        local = {};
        // init modeJs
        local.modeJs = (function () {
            try {
                return typeof navigator.userAgent === 'string' &&
                    typeof document.querySelector('body') === 'object' &&
                    typeof XMLHttpRequest.prototype.open === 'function' &&
                    'browser';
            } catch (errorCaughtBrowser) {
                return module.exports &&
                    typeof process.versions.node === 'string' &&
                    typeof require('http').createServer === 'function' &&
                    'node';
            }
        }());
        // init global
        local.global = local.modeJs === 'browser'
            ? window
            : global;
        switch (local.modeJs) {
        // re-init local from window.local
        case 'browser':
            local = local.global.utility2.objectSetDefault(
                local.global.utility2_rollup || local.global.local,
                local.global.utility2
            );
            break;
        // re-init local from example.js
        case 'node':
            local = (local.global.utility2_rollup || require('utility2'))
                .requireReadme();
            break;
        }
        // export local
        local.global.local = local;
    }());
 
 
 
    // run shared js-env code - function
    (function () {
        return;
    }());
    switch (local.modeJs) {
 
 
 
    // run browser js-env code - function
    case 'browser':
        break;
 
 
 
    // run node js-env code - function
    case 'node':
        break;
    }
 
 
 
    // run shared js-env code - init-after
    (function () {
        return;
    }());
    switch (local.modeJs) {
 
 
 
    // run browser js-env code - init-after
    case 'browser':
        local.testCase_browser_nullCase = local.testCase_browser_nullCase || function (
            options,
            onError
        ) {
        /*
         * this function will test browsers's null-case handling-behavior-behavior
         */
            onError(null, options);
        };
 
        // run tests
        local.nop(local.modeTest &&
            document.querySelector('#testRunButton1') &&
            document.querySelector('#testRunButton1').click());
        break;
 
 
 
    // run node js-env code - init-after
    /* istanbul ignore next */
    case 'node':
        local.testCase_buildApidoc_default = local.testCase_buildApidoc_default || function (
            options,
            onError
        ) {
        /*
         * this function will test buildApidoc's default handling-behavior-behavior
         */
            options = { modulePathList: module.paths };
            local.buildApidoc(options, onError);
        };
 
        local.testCase_buildApp_default = local.testCase_buildApp_default || function (
            options,
            onError
        ) {
        /*
         * this function will test buildApp's default handling-behavior-behavior
         */
            local.testCase_buildReadme_default(options, local.onErrorThrow);
            local.testCase_buildLib_default(options, local.onErrorThrow);
            local.testCase_buildTest_default(options, local.onErrorThrow);
            local.testCase_buildCustomOrg_default(options, local.onErrorThrow);
            options = [];
            local.buildApp(options, onError);
        };
 
        local.testCase_buildCustomOrg_default = local.testCase_buildCustomOrg_default ||
            function (options, onError) {
            /*
             * this function will test buildCustomOrg's default handling-behavior
             */
                options = {};
                local.buildCustomOrg(options, onError);
            };
 
        local.testCase_buildLib_default = local.testCase_buildLib_default || function (
            options,
            onError
        ) {
        /*
         * this function will test buildLib's default handling-behavior
         */
            options = {};
            local.buildLib(options, onError);
        };
 
        local.testCase_buildReadme_default = local.testCase_buildReadme_default || function (
            options,
            onError
        ) {
        /*
         * this function will test buildReadme's default handling-behavior-behavior
         */
            options = {};
            local.buildReadme(options, onError);
        };
 
        local.testCase_buildTest_default = local.testCase_buildTest_default || function (
            options,
            onError
        ) {
        /*
         * this function will test buildTest's default handling-behavior
         */
            options = {};
            local.buildTest(options, onError);
        };
 
        local.testCase_webpage_default = local.testCase_webpage_default || function (
            options,
            onError
        ) {
        /*
         * this function will test webpage's default handling-behavior
         */
            options = { modeCoverageMerge: true, url: local.serverLocalHost + '?modeTest=1' };
            local.browserTest(options, onError);
        };
 
        // run test-server
        local.testRunServer(local);
        break;
    }
}());
 
 

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'use strict';
 
module.exports = require('./lib/ReactTestRenderer');
 
 

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'use strict';
 
module.exports = require('./lib/shallow/ReactShallowRenderer');
 
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var _prodInvariant = require('./reactProdInvariant');
 
function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
var PooledClass = require('./PooledClass');
 
var invariant = require('fbjs/lib/invariant');
 
/**
 * A specialized pseudo-event module to help keep track of components waiting to
 * be notified when their DOM representations are available for use.
 *
 * This implements `PooledClass`, so you should never need to instantiate this.
 * Instead, use `CallbackQueue.getPooled()`.
 *
 * @class ReactMountReady
 * @implements PooledClass
 * @internal
 */
 
var CallbackQueue = function () {
  function CallbackQueue(arg) {
    _classCallCheck(this, CallbackQueue);
 
    this._callbacks = null;
    this._contexts = null;
    this._arg = arg;
  }
 
  /**
   * Enqueues a callback to be invoked when `notifyAll` is invoked.
   *
   * @param {function} callback Invoked when `notifyAll` is invoked.
   * @param {?object} context Context to call `callback` with.
   * @internal
   */
 
 
  CallbackQueue.prototype.enqueue = function enqueue(callback, context) {
    this._callbacks = this._callbacks || [];
    this._callbacks.push(callback);
    this._contexts = this._contexts || [];
    this._contexts.push(context);
  };
 
  /**
   * Invokes all enqueued callbacks and clears the queue. This is invoked after
   * the DOM representation of a component has been created or updated.
   *
   * @internal
   */
 
 
  CallbackQueue.prototype.notifyAll = function notifyAll() {
    var callbacks = this._callbacks;
    var contexts = this._contexts;
    var arg = this._arg;
    if (callbacks && contexts) {
      !(callbacks.length === contexts.length) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Mismatched list of contexts in callback queue') : _prodInvariant('24') : void 0;
      this._callbacks = null;
      this._contexts = null;
      for (var i = 0; i < callbacks.length; i++) {
        callbacks[i].call(contexts[i], arg);
      }
      callbacks.length = 0;
      contexts.length = 0;
    }
  };
 
  CallbackQueue.prototype.checkpoint = function checkpoint() {
    return this._callbacks ? this._callbacks.length : 0;
  };
 
  CallbackQueue.prototype.rollback = function rollback(len) {
    if (this._callbacks && this._contexts) {
      this._callbacks.length = len;
      this._contexts.length = len;
    }
  };
 
  /**
   * Resets the internal queue.
   *
   * @internal
   */
 
 
  CallbackQueue.prototype.reset = function reset() {
    this._callbacks = null;
    this._contexts = null;
  };
 
  /**
   * `PooledClass` looks for this.
   */
 
 
  CallbackQueue.prototype.destructor = function destructor() {
    this.reset();
  };
 
  return CallbackQueue;
}();
 
module.exports = PooledClass.addPoolingTo(CallbackQueue);
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
/**
 * Types of raw signals from the browser caught at the top level.
 */
var topLevelTypes = {
  topAbort: null,
  topAnimationEnd: null,
  topAnimationIteration: null,
  topAnimationStart: null,
  topBlur: null,
  topCanPlay: null,
  topCanPlayThrough: null,
  topChange: null,
  topClick: null,
  topCompositionEnd: null,
  topCompositionStart: null,
  topCompositionUpdate: null,
  topContextMenu: null,
  topCopy: null,
  topCut: null,
  topDoubleClick: null,
  topDrag: null,
  topDragEnd: null,
  topDragEnter: null,
  topDragExit: null,
  topDragLeave: null,
  topDragOver: null,
  topDragStart: null,
  topDrop: null,
  topDurationChange: null,
  topEmptied: null,
  topEncrypted: null,
  topEnded: null,
  topError: null,
  topFocus: null,
  topInput: null,
  topInvalid: null,
  topKeyDown: null,
  topKeyPress: null,
  topKeyUp: null,
  topLoad: null,
  topLoadedData: null,
  topLoadedMetadata: null,
  topLoadStart: null,
  topMouseDown: null,
  topMouseMove: null,
  topMouseOut: null,
  topMouseOver: null,
  topMouseUp: null,
  topPaste: null,
  topPause: null,
  topPlay: null,
  topPlaying: null,
  topProgress: null,
  topRateChange: null,
  topReset: null,
  topScroll: null,
  topSeeked: null,
  topSeeking: null,
  topSelectionChange: null,
  topStalled: null,
  topSubmit: null,
  topSuspend: null,
  topTextInput: null,
  topTimeUpdate: null,
  topTouchCancel: null,
  topTouchEnd: null,
  topTouchMove: null,
  topTouchStart: null,
  topTransitionEnd: null,
  topVolumeChange: null,
  topWaiting: null,
  topWheel: null
};
 
var EventConstants = {
  topLevelTypes: topLevelTypes
};
 
module.exports = EventConstants;
 

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1
 
/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var _prodInvariant = require('./reactProdInvariant');
 
var EventPluginRegistry = require('./EventPluginRegistry');
var EventPluginUtils = require('./EventPluginUtils');
var ReactErrorUtils = require('./ReactErrorUtils');
 
var accumulateInto = require('./accumulateInto');
var forEachAccumulated = require('./forEachAccumulated');
var invariant = require('fbjs/lib/invariant');
 
/**
 * Internal store for event listeners
 */
var listenerBank = {};
 
/**
 * Internal queue of events that have accumulated their dispatches and are
 * waiting to have their dispatches executed.
 */
var eventQueue = null;
 
/**
 * Dispatches an event and releases it back into the pool, unless persistent.
 *
 * @param {?object} event Synthetic event to be dispatched.
 * @param {boolean} simulated If the event is simulated (changes exn behavior)
 * @private
 */
var executeDispatchesAndRelease = function (event, simulated) {
  if (event) {
    EventPluginUtils.executeDispatchesInOrder(event, simulated);
 
    if (!event.isPersistent()) {
      event.constructor.release(event);
    }
  }
};
var executeDispatchesAndReleaseSimulated = function (e) {
  return executeDispatchesAndRelease(e, true);
};
var executeDispatchesAndReleaseTopLevel = function (e) {
  return executeDispatchesAndRelease(e, false);
};
 
var getDictionaryKey = function (inst) {
  // Prevents V8 performance issue:
  // https://github.com/facebook/react/pull/7232
  return '.' + inst._rootNodeID;
};
 
function isInteractive(tag) {
  return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';
}
 
function shouldPreventMouseEvent(name, type, props) {
  switch (name) {
    case 'onClick':
    case 'onClickCapture':
    case 'onDoubleClick':
    case 'onDoubleClickCapture':
    case 'onMouseDown':
    case 'onMouseDownCapture':
    case 'onMouseMove':
    case 'onMouseMoveCapture':
    case 'onMouseUp':
    case 'onMouseUpCapture':
      return !!(props.disabled && isInteractive(type));
    default:
      return false;
  }
}
 
/**
 * This is a unified interface for event plugins to be installed and configured.
 *
 * Event plugins can implement the following properties:
 *
 *   `extractEvents` {function(string, DOMEventTarget, string, object): *}
 *     Required. When a top-level event is fired, this method is expected to
 *     extract synthetic events that will in turn be queued and dispatched.
 *
 *   `eventTypes` {object}
 *     Optional, plugins that fire events must publish a mapping of registration
 *     names that are used to register listeners. Values of this mapping must
 *     be objects that contain `registrationName` or `phasedRegistrationNames`.
 *
 *   `executeDispatch` {function(object, function, string)}
 *     Optional, allows plugins to override how an event gets dispatched. By
 *     default, the listener is simply invoked.
 *
 * Each plugin that is injected into `EventsPluginHub` is immediately operable.
 *
 * @public
 */
var EventPluginHub = {
 
  /**
   * Methods for injecting dependencies.
   */
  injection: {
 
    /**
     * @param {array} InjectedEventPluginOrder
     * @public
     */
    injectEventPluginOrder: EventPluginRegistry.injectEventPluginOrder,
 
    /**
     * @param {object} injectedNamesToPlugins Map from names to plugin modules.
     */
    injectEventPluginsByName: EventPluginRegistry.injectEventPluginsByName
 
  },
 
  /**
   * Stores `listener` at `listenerBank[registrationName][key]`. Is idempotent.
   *
   * @param {object} inst The instance, which is the source of events.
   * @param {string} registrationName Name of listener (e.g. `onClick`).
   * @param {function} listener The callback to store.
   */
  putListener: function (inst, registrationName, listener) {
    !(typeof listener === 'function') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Expected %s listener to be a function, instead got type %s', registrationName, typeof listener) : _prodInvariant('94', registrationName, typeof listener) : void 0;
 
    var key = getDictionaryKey(inst);
    var bankForRegistrationName = listenerBank[registrationName] || (listenerBank[registrationName] = {});
    bankForRegistrationName[key] = listener;
 
    var PluginModule = EventPluginRegistry.registrationNameModules[registrationName];
    if (PluginModule && PluginModule.didPutListener) {
      PluginModule.didPutListener(inst, registrationName, listener);
    }
  },
 
  /**
   * @param {object} inst The instance, which is the source of events.
   * @param {string} registrationName Name of listener (e.g. `onClick`).
   * @return {?function} The stored callback.
   */
  getListener: function (inst, registrationName) {
    // TODO: shouldPreventMouseEvent is DOM-specific and definitely should not
    // live here; needs to be moved to a better place soon
    var bankForRegistrationName = listenerBank[registrationName];
    if (shouldPreventMouseEvent(registrationName, inst._currentElement.type, inst._currentElement.props)) {
      return null;
    }
    var key = getDictionaryKey(inst);
    return bankForRegistrationName && bankForRegistrationName[key];
  },
 
  /**
   * Deletes a listener from the registration bank.
   *
   * @param {object} inst The instance, which is the source of events.
   * @param {string} registrationName Name of listener (e.g. `onClick`).
   */
  deleteListener: function (inst, registrationName) {
    var PluginModule = EventPluginRegistry.registrationNameModules[registrationName];
    if (PluginModule && PluginModule.willDeleteListener) {
      PluginModule.willDeleteListener(inst, registrationName);
    }
 
    var bankForRegistrationName = listenerBank[registrationName];
    // TODO: This should never be null -- when is it?
    if (bankForRegistrationName) {
      var key = getDictionaryKey(inst);
      delete bankForRegistrationName[key];
    }
  },
 
  /**
   * Deletes all listeners for the DOM element with the supplied ID.
   *
   * @param {object} inst The instance, which is the source of events.
   */
  deleteAllListeners: function (inst) {
    var key = getDictionaryKey(inst);
    for (var registrationName in listenerBank) {
      if (!listenerBank.hasOwnProperty(registrationName)) {
        continue;
      }
 
      if (!listenerBank[registrationName][key]) {
        continue;
      }
 
      var PluginModule = EventPluginRegistry.registrationNameModules[registrationName];
      if (PluginModule && PluginModule.willDeleteListener) {
        PluginModule.willDeleteListener(inst, registrationName);
      }
 
      delete listenerBank[registrationName][key];
    }
  },
 
  /**
   * Allows registered plugins an opportunity to extract events from top-level
   * native browser events.
   *
   * @return {*} An accumulation of synthetic events.
   * @internal
   */
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var events;
    var plugins = EventPluginRegistry.plugins;
    for (var i = 0; i < plugins.length; i++) {
      // Not every plugin in the ordering may be loaded at runtime.
      var possiblePlugin = plugins[i];
      if (possiblePlugin) {
        var extractedEvents = possiblePlugin.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);
        if (extractedEvents) {
          events = accumulateInto(events, extractedEvents);
        }
      }
    }
    return events;
  },
 
  /**
   * Enqueues a synthetic event that should be dispatched when
   * `processEventQueue` is invoked.
   *
   * @param {*} events An accumulation of synthetic events.
   * @internal
   */
  enqueueEvents: function (events) {
    if (events) {
      eventQueue = accumulateInto(eventQueue, events);
    }
  },
 
  /**
   * Dispatches all synthetic events on the event queue.
   *
   * @internal
   */
  processEventQueue: function (simulated) {
    // Set `eventQueue` to null before processing it so that we can tell if more
    // events get enqueued while processing.
    var processingEventQueue = eventQueue;
    eventQueue = null;
    if (simulated) {
      forEachAccumulated(processingEventQueue, executeDispatchesAndReleaseSimulated);
    } else {
      forEachAccumulated(processingEventQueue, executeDispatchesAndReleaseTopLevel);
    }
    !!eventQueue ? process.env.NODE_ENV !== 'production' ? invariant(false, 'processEventQueue(): Additional events were enqueued while processing an event queue. Support for this has not yet been implemented.') : _prodInvariant('95') : void 0;
    // This would be a good time to rethrow if any of the event handlers threw.
    ReactErrorUtils.rethrowCaughtError();
  },
 
  /**
   * These are needed for tests only. Do not use!
   */
  __purge: function () {
    listenerBank = {};
  },
 
  __getListenerBank: function () {
    return listenerBank;
  }
 
};
 
module.exports = EventPluginHub;
 

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1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
 
/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var _prodInvariant = require('./reactProdInvariant');
 
var invariant = require('fbjs/lib/invariant');
 
/**
 * Injectable ordering of event plugins.
 */
var eventPluginOrder = null;
 
/**
 * Injectable mapping from names to event plugin modules.
 */
var namesToPlugins = {};
 
/**
 * Recomputes the plugin list using the injected plugins and plugin ordering.
 *
 * @private
 */
function recomputePluginOrdering() {
  if (!eventPluginOrder) {
    // Wait until an `eventPluginOrder` is injected.
    return;
  }
  for (var pluginName in namesToPlugins) {
    var pluginModule = namesToPlugins[pluginName];
    var pluginIndex = eventPluginOrder.indexOf(pluginName);
    !(pluginIndex > -1) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `%s`.', pluginName) : _prodInvariant('96', pluginName) : void 0;
    if (EventPluginRegistry.plugins[pluginIndex]) {
      continue;
    }
    !pluginModule.extractEvents ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `%s` does not.', pluginName) : _prodInvariant('97', pluginName) : void 0;
    EventPluginRegistry.plugins[pluginIndex] = pluginModule;
    var publishedEvents = pluginModule.eventTypes;
    for (var eventName in publishedEvents) {
      !publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Failed to publish event `%s` for plugin `%s`.', eventName, pluginName) : _prodInvariant('98', eventName, pluginName) : void 0;
    }
  }
}
 
/**
 * Publishes an event so that it can be dispatched by the supplied plugin.
 *
 * @param {object} dispatchConfig Dispatch configuration for the event.
 * @param {object} PluginModule Plugin publishing the event.
 * @return {boolean} True if the event was successfully published.
 * @private
 */
function publishEventForPlugin(dispatchConfig, pluginModule, eventName) {
  !!EventPluginRegistry.eventNameDispatchConfigs.hasOwnProperty(eventName) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same event name, `%s`.', eventName) : _prodInvariant('99', eventName) : void 0;
  EventPluginRegistry.eventNameDispatchConfigs[eventName] = dispatchConfig;
 
  var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;
  if (phasedRegistrationNames) {
    for (var phaseName in phasedRegistrationNames) {
      if (phasedRegistrationNames.hasOwnProperty(phaseName)) {
        var phasedRegistrationName = phasedRegistrationNames[phaseName];
        publishRegistrationName(phasedRegistrationName, pluginModule, eventName);
      }
    }
    return true;
  } else if (dispatchConfig.registrationName) {
    publishRegistrationName(dispatchConfig.registrationName, pluginModule, eventName);
    return true;
  }
  return false;
}
 
/**
 * Publishes a registration name that is used to identify dispatched events and
 * can be used with `EventPluginHub.putListener` to register listeners.
 *
 * @param {string} registrationName Registration name to add.
 * @param {object} PluginModule Plugin publishing the event.
 * @private
 */
function publishRegistrationName(registrationName, pluginModule, eventName) {
  !!EventPluginRegistry.registrationNameModules[registrationName] ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same registration name, `%s`.', registrationName) : _prodInvariant('100', registrationName) : void 0;
  EventPluginRegistry.registrationNameModules[registrationName] = pluginModule;
  EventPluginRegistry.registrationNameDependencies[registrationName] = pluginModule.eventTypes[eventName].dependencies;
 
  if (process.env.NODE_ENV !== 'production') {
    var lowerCasedName = registrationName.toLowerCase();
    EventPluginRegistry.possibleRegistrationNames[lowerCasedName] = registrationName;
 
    if (registrationName === 'onDoubleClick') {
      EventPluginRegistry.possibleRegistrationNames.ondblclick = registrationName;
    }
  }
}
 
/**
 * Registers plugins so that they can extract and dispatch events.
 *
 * @see {EventPluginHub}
 */
var EventPluginRegistry = {
 
  /**
   * Ordered list of injected plugins.
   */
  plugins: [],
 
  /**
   * Mapping from event name to dispatch config
   */
  eventNameDispatchConfigs: {},
 
  /**
   * Mapping from registration name to plugin module
   */
  registrationNameModules: {},
 
  /**
   * Mapping from registration name to event name
   */
  registrationNameDependencies: {},
 
  /**
   * Mapping from lowercase registration names to the properly cased version,
   * used to warn in the case of missing event handlers. Available
   * only in __DEV__.
   * @type {Object}
   */
  possibleRegistrationNames: process.env.NODE_ENV !== 'production' ? {} : null,
  // Trust the developer to only use possibleRegistrationNames in __DEV__
 
  /**
   * Injects an ordering of plugins (by plugin name). This allows the ordering
   * to be decoupled from injection of the actual plugins so that ordering is
   * always deterministic regardless of packaging, on-the-fly injection, etc.
   *
   * @param {array} InjectedEventPluginOrder
   * @internal
   * @see {EventPluginHub.injection.injectEventPluginOrder}
   */
  injectEventPluginOrder: function (injectedEventPluginOrder) {
    !!eventPluginOrder ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Cannot inject event plugin ordering more than once. You are likely trying to load more than one copy of React.') : _prodInvariant('101') : void 0;
    // Clone the ordering so it cannot be dynamically mutated.
    eventPluginOrder = Array.prototype.slice.call(injectedEventPluginOrder);
    recomputePluginOrdering();
  },
 
  /**
   * Injects plugins to be used by `EventPluginHub`. The plugin names must be
   * in the ordering injected by `injectEventPluginOrder`.
   *
   * Plugins can be injected as part of page initialization or on-the-fly.
   *
   * @param {object} injectedNamesToPlugins Map from names to plugin modules.
   * @internal
   * @see {EventPluginHub.injection.injectEventPluginsByName}
   */
  injectEventPluginsByName: function (injectedNamesToPlugins) {
    var isOrderingDirty = false;
    for (var pluginName in injectedNamesToPlugins) {
      if (!injectedNamesToPlugins.hasOwnProperty(pluginName)) {
        continue;
      }
      var pluginModule = injectedNamesToPlugins[pluginName];
      if (!namesToPlugins.hasOwnProperty(pluginName) || namesToPlugins[pluginName] !== pluginModule) {
        !!namesToPlugins[pluginName] ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Cannot inject two different event plugins using the same name, `%s`.', pluginName) : _prodInvariant('102', pluginName) : void 0;
        namesToPlugins[pluginName] = pluginModule;
        isOrderingDirty = true;
      }
    }
    if (isOrderingDirty) {
      recomputePluginOrdering();
    }
  },
 
  /**
   * Looks up the plugin for the supplied event.
   *
   * @param {object} event A synthetic event.
   * @return {?object} The plugin that created the supplied event.
   * @internal
   */
  getPluginModuleForEvent: function (event) {
    var dispatchConfig = event.dispatchConfig;
    if (dispatchConfig.registrationName) {
      return EventPluginRegistry.registrationNameModules[dispatchConfig.registrationName] || null;
    }
    if (dispatchConfig.phasedRegistrationNames !== undefined) {
      // pulling phasedRegistrationNames out of dispatchConfig helps Flow see
      // that it is not undefined.
      var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;
 
      for (var phase in phasedRegistrationNames) {
        if (!phasedRegistrationNames.hasOwnProperty(phase)) {
          continue;
        }
        var pluginModule = EventPluginRegistry.registrationNameModules[phasedRegistrationNames[phase]];
        if (pluginModule) {
          return pluginModule;
        }
      }
    }
    return null;
  },
 
  /**
   * Exposed for unit testing.
   * @private
   */
  _resetEventPlugins: function () {
    eventPluginOrder = null;
    for (var pluginName in namesToPlugins) {
      if (namesToPlugins.hasOwnProperty(pluginName)) {
        delete namesToPlugins[pluginName];
      }
    }
    EventPluginRegistry.plugins.length = 0;
 
    var eventNameDispatchConfigs = EventPluginRegistry.eventNameDispatchConfigs;
    for (var eventName in eventNameDispatchConfigs) {
      if (eventNameDispatchConfigs.hasOwnProperty(eventName)) {
        delete eventNameDispatchConfigs[eventName];
      }
    }
 
    var registrationNameModules = EventPluginRegistry.registrationNameModules;
    for (var registrationName in registrationNameModules) {
      if (registrationNameModules.hasOwnProperty(registrationName)) {
        delete registrationNameModules[registrationName];
      }
    }
 
    if (process.env.NODE_ENV !== 'production') {
      var possibleRegistrationNames = EventPluginRegistry.possibleRegistrationNames;
      for (var lowerCasedName in possibleRegistrationNames) {
        if (possibleRegistrationNames.hasOwnProperty(lowerCasedName)) {
          delete possibleRegistrationNames[lowerCasedName];
        }
      }
    }
  }
 
};
 
module.exports = EventPluginRegistry;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var _prodInvariant = require('./reactProdInvariant');
 
var ReactErrorUtils = require('./ReactErrorUtils');
 
var invariant = require('fbjs/lib/invariant');
var warning = require('fbjs/lib/warning');
 
/**
 * Injected dependencies:
 */
 
/**
 * - `ComponentTree`: [required] Module that can convert between React instances
 *   and actual node references.
 */
var ComponentTree;
var TreeTraversal;
var injection = {
  injectComponentTree: function (Injected) {
    ComponentTree = Injected;
    if (process.env.NODE_ENV !== 'production') {
      process.env.NODE_ENV !== 'production' ? warning(Injected && Injected.getNodeFromInstance && Injected.getInstanceFromNode, 'EventPluginUtils.injection.injectComponentTree(...): Injected ' + 'module is missing getNodeFromInstance or getInstanceFromNode.') : void 0;
    }
  },
  injectTreeTraversal: function (Injected) {
    TreeTraversal = Injected;
    if (process.env.NODE_ENV !== 'production') {
      process.env.NODE_ENV !== 'production' ? warning(Injected && Injected.isAncestor && Injected.getLowestCommonAncestor, 'EventPluginUtils.injection.injectTreeTraversal(...): Injected ' + 'module is missing isAncestor or getLowestCommonAncestor.') : void 0;
    }
  }
};
 
function isEndish(topLevelType) {
  return topLevelType === 'topMouseUp' || topLevelType === 'topTouchEnd' || topLevelType === 'topTouchCancel';
}
 
function isMoveish(topLevelType) {
  return topLevelType === 'topMouseMove' || topLevelType === 'topTouchMove';
}
function isStartish(topLevelType) {
  return topLevelType === 'topMouseDown' || topLevelType === 'topTouchStart';
}
 
var validateEventDispatches;
Eif (process.env.NODE_ENV !== 'production') {
  validateEventDispatches = function (event) {
    var dispatchListeners = event._dispatchListeners;
    var dispatchInstances = event._dispatchInstances;
 
    var listenersIsArr = Array.isArray(dispatchListeners);
    var listenersLen = listenersIsArr ? dispatchListeners.length : dispatchListeners ? 1 : 0;
 
    var instancesIsArr = Array.isArray(dispatchInstances);
    var instancesLen = instancesIsArr ? dispatchInstances.length : dispatchInstances ? 1 : 0;
 
    process.env.NODE_ENV !== 'production' ? warning(instancesIsArr === listenersIsArr && instancesLen === listenersLen, 'EventPluginUtils: Invalid `event`.') : void 0;
  };
}
 
/**
 * Dispatch the event to the listener.
 * @param {SyntheticEvent} event SyntheticEvent to handle
 * @param {boolean} simulated If the event is simulated (changes exn behavior)
 * @param {function} listener Application-level callback
 * @param {*} inst Internal component instance
 */
function executeDispatch(event, simulated, listener, inst) {
  var type = event.type || 'unknown-event';
  event.currentTarget = EventPluginUtils.getNodeFromInstance(inst);
  if (simulated) {
    ReactErrorUtils.invokeGuardedCallbackWithCatch(type, listener, event);
  } else {
    ReactErrorUtils.invokeGuardedCallback(type, listener, event);
  }
  event.currentTarget = null;
}
 
/**
 * Standard/simple iteration through an event's collected dispatches.
 */
function executeDispatchesInOrder(event, simulated) {
  var dispatchListeners = event._dispatchListeners;
  var dispatchInstances = event._dispatchInstances;
  if (process.env.NODE_ENV !== 'production') {
    validateEventDispatches(event);
  }
  if (Array.isArray(dispatchListeners)) {
    for (var i = 0; i < dispatchListeners.length; i++) {
      if (event.isPropagationStopped()) {
        break;
      }
      // Listeners and Instances are two parallel arrays that are always in sync.
      executeDispatch(event, simulated, dispatchListeners[i], dispatchInstances[i]);
    }
  } else if (dispatchListeners) {
    executeDispatch(event, simulated, dispatchListeners, dispatchInstances);
  }
  event._dispatchListeners = null;
  event._dispatchInstances = null;
}
 
/**
 * Standard/simple iteration through an event's collected dispatches, but stops
 * at the first dispatch execution returning true, and returns that id.
 *
 * @return {?string} id of the first dispatch execution who's listener returns
 * true, or null if no listener returned true.
 */
function executeDispatchesInOrderStopAtTrueImpl(event) {
  var dispatchListeners = event._dispatchListeners;
  var dispatchInstances = event._dispatchInstances;
  if (process.env.NODE_ENV !== 'production') {
    validateEventDispatches(event);
  }
  if (Array.isArray(dispatchListeners)) {
    for (var i = 0; i < dispatchListeners.length; i++) {
      if (event.isPropagationStopped()) {
        break;
      }
      // Listeners and Instances are two parallel arrays that are always in sync.
      if (dispatchListeners[i](event, dispatchInstances[i])) {
        return dispatchInstances[i];
      }
    }
  } else if (dispatchListeners) {
    if (dispatchListeners(event, dispatchInstances)) {
      return dispatchInstances;
    }
  }
  return null;
}
 
/**
 * @see executeDispatchesInOrderStopAtTrueImpl
 */
function executeDispatchesInOrderStopAtTrue(event) {
  var ret = executeDispatchesInOrderStopAtTrueImpl(event);
  event._dispatchInstances = null;
  event._dispatchListeners = null;
  return ret;
}
 
/**
 * Execution of a "direct" dispatch - there must be at most one dispatch
 * accumulated on the event or it is considered an error. It doesn't really make
 * sense for an event with multiple dispatches (bubbled) to keep track of the
 * return values at each dispatch execution, but it does tend to make sense when
 * dealing with "direct" dispatches.
 *
 * @return {*} The return value of executing the single dispatch.
 */
function executeDirectDispatch(event) {
  if (process.env.NODE_ENV !== 'production') {
    validateEventDispatches(event);
  }
  var dispatchListener = event._dispatchListeners;
  var dispatchInstance = event._dispatchInstances;
  !!Array.isArray(dispatchListener) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'executeDirectDispatch(...): Invalid `event`.') : _prodInvariant('103') : void 0;
  event.currentTarget = dispatchListener ? EventPluginUtils.getNodeFromInstance(dispatchInstance) : null;
  var res = dispatchListener ? dispatchListener(event) : null;
  event.currentTarget = null;
  event._dispatchListeners = null;
  event._dispatchInstances = null;
  return res;
}
 
/**
 * @param {SyntheticEvent} event
 * @return {boolean} True iff number of dispatches accumulated is greater than 0.
 */
function hasDispatches(event) {
  return !!event._dispatchListeners;
}
 
/**
 * General utilities that are useful in creating custom Event Plugins.
 */
var EventPluginUtils = {
  isEndish: isEndish,
  isMoveish: isMoveish,
  isStartish: isStartish,
 
  executeDirectDispatch: executeDirectDispatch,
  executeDispatchesInOrder: executeDispatchesInOrder,
  executeDispatchesInOrderStopAtTrue: executeDispatchesInOrderStopAtTrue,
  hasDispatches: hasDispatches,
 
  getInstanceFromNode: function (node) {
    return ComponentTree.getInstanceFromNode(node);
  },
  getNodeFromInstance: function (node) {
    return ComponentTree.getNodeFromInstance(node);
  },
  isAncestor: function (a, b) {
    return TreeTraversal.isAncestor(a, b);
  },
  getLowestCommonAncestor: function (a, b) {
    return TreeTraversal.getLowestCommonAncestor(a, b);
  },
  getParentInstance: function (inst) {
    return TreeTraversal.getParentInstance(inst);
  },
  traverseTwoPhase: function (target, fn, arg) {
    return TreeTraversal.traverseTwoPhase(target, fn, arg);
  },
  traverseEnterLeave: function (from, to, fn, argFrom, argTo) {
    return TreeTraversal.traverseEnterLeave(from, to, fn, argFrom, argTo);
  },
 
  injection: injection
};
 
module.exports = EventPluginUtils;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var EventPluginHub = require('./EventPluginHub');
var EventPluginUtils = require('./EventPluginUtils');
 
var accumulateInto = require('./accumulateInto');
var forEachAccumulated = require('./forEachAccumulated');
var warning = require('fbjs/lib/warning');
 
var getListener = EventPluginHub.getListener;
 
/**
 * Some event types have a notion of different registration names for different
 * "phases" of propagation. This finds listeners by a given phase.
 */
function listenerAtPhase(inst, event, propagationPhase) {
  var registrationName = event.dispatchConfig.phasedRegistrationNames[propagationPhase];
  return getListener(inst, registrationName);
}
 
/**
 * Tags a `SyntheticEvent` with dispatched listeners. Creating this function
 * here, allows us to not have to bind or create functions for each event.
 * Mutating the event's members allows us to not have to create a wrapping
 * "dispatch" object that pairs the event with the listener.
 */
function accumulateDirectionalDispatches(inst, phase, event) {
  if (process.env.NODE_ENV !== 'production') {
    process.env.NODE_ENV !== 'production' ? warning(inst, 'Dispatching inst must not be null') : void 0;
  }
  var listener = listenerAtPhase(inst, event, phase);
  if (listener) {
    event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);
    event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);
  }
}
 
/**
 * Collect dispatches (must be entirely collected before dispatching - see unit
 * tests). Lazily allocate the array to conserve memory.  We must loop through
 * each event and perform the traversal for each one. We cannot perform a
 * single traversal for the entire collection of events because each event may
 * have a different target.
 */
function accumulateTwoPhaseDispatchesSingle(event) {
  if (event && event.dispatchConfig.phasedRegistrationNames) {
    EventPluginUtils.traverseTwoPhase(event._targetInst, accumulateDirectionalDispatches, event);
  }
}
 
/**
 * Same as `accumulateTwoPhaseDispatchesSingle`, but skips over the targetID.
 */
function accumulateTwoPhaseDispatchesSingleSkipTarget(event) {
  if (event && event.dispatchConfig.phasedRegistrationNames) {
    var targetInst = event._targetInst;
    var parentInst = targetInst ? EventPluginUtils.getParentInstance(targetInst) : null;
    EventPluginUtils.traverseTwoPhase(parentInst, accumulateDirectionalDispatches, event);
  }
}
 
/**
 * Accumulates without regard to direction, does not look for phased
 * registration names. Same as `accumulateDirectDispatchesSingle` but without
 * requiring that the `dispatchMarker` be the same as the dispatched ID.
 */
function accumulateDispatches(inst, ignoredDirection, event) {
  if (event && event.dispatchConfig.registrationName) {
    var registrationName = event.dispatchConfig.registrationName;
    var listener = getListener(inst, registrationName);
    if (listener) {
      event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);
      event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);
    }
  }
}
 
/**
 * Accumulates dispatches on an `SyntheticEvent`, but only for the
 * `dispatchMarker`.
 * @param {SyntheticEvent} event
 */
function accumulateDirectDispatchesSingle(event) {
  if (event && event.dispatchConfig.registrationName) {
    accumulateDispatches(event._targetInst, null, event);
  }
}
 
function accumulateTwoPhaseDispatches(events) {
  forEachAccumulated(events, accumulateTwoPhaseDispatchesSingle);
}
 
function accumulateTwoPhaseDispatchesSkipTarget(events) {
  forEachAccumulated(events, accumulateTwoPhaseDispatchesSingleSkipTarget);
}
 
function accumulateEnterLeaveDispatches(leave, enter, from, to) {
  EventPluginUtils.traverseEnterLeave(from, to, accumulateDispatches, leave, enter);
}
 
function accumulateDirectDispatches(events) {
  forEachAccumulated(events, accumulateDirectDispatchesSingle);
}
 
/**
 * A small set of propagation patterns, each of which will accept a small amount
 * of information, and generate a set of "dispatch ready event objects" - which
 * are sets of events that have already been annotated with a set of dispatched
 * listener functions/ids. The API is designed this way to discourage these
 * propagation strategies from actually executing the dispatches, since we
 * always want to collect the entire set of dispatches before executing event a
 * single one.
 *
 * @constructor EventPropagators
 */
var EventPropagators = {
  accumulateTwoPhaseDispatches: accumulateTwoPhaseDispatches,
  accumulateTwoPhaseDispatchesSkipTarget: accumulateTwoPhaseDispatchesSkipTarget,
  accumulateDirectDispatches: accumulateDirectDispatches,
  accumulateEnterLeaveDispatches: accumulateEnterLeaveDispatches
};
 
module.exports = EventPropagators;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
/**
 * Escape and wrap key so it is safe to use as a reactid
 *
 * @param {string} key to be escaped.
 * @return {string} the escaped key.
 */
 
function escape(key) {
  var escapeRegex = /[=:]/g;
  var escaperLookup = {
    '=': '=0',
    ':': '=2'
  };
  var escapedString = ('' + key).replace(escapeRegex, function (match) {
    return escaperLookup[match];
  });
 
  return '$' + escapedString;
}
 
/**
 * Unescape and unwrap key for human-readable display
 *
 * @param {string} key to unescape.
 * @return {string} the unescaped key.
 */
function unescape(key) {
  var unescapeRegex = /(=0|=2)/g;
  var unescaperLookup = {
    '=0': '=',
    '=2': ':'
  };
  var keySubstring = key[0] === '.' && key[1] === '$' ? key.substring(2) : key.substring(1);
 
  return ('' + keySubstring).replace(unescapeRegex, function (match) {
    return unescaperLookup[match];
  });
}
 
var KeyEscapeUtils = {
  escape: escape,
  unescape: unescape
};
 
module.exports = KeyEscapeUtils;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var _prodInvariant = require('./reactProdInvariant');
 
var invariant = require('fbjs/lib/invariant');
 
/**
 * Static poolers. Several custom versions for each potential number of
 * arguments. A completely generic pooler is easy to implement, but would
 * require accessing the `arguments` object. In each of these, `this` refers to
 * the Class itself, not an instance. If any others are needed, simply add them
 * here, or in their own files.
 */
var oneArgumentPooler = function (copyFieldsFrom) {
  var Klass = this;
  Iif (Klass.instancePool.length) {
    var instance = Klass.instancePool.pop();
    Klass.call(instance, copyFieldsFrom);
    return instance;
  } else {
    return new Klass(copyFieldsFrom);
  }
};
 
var twoArgumentPooler = function (a1, a2) {
  var Klass = this;
  if (Klass.instancePool.length) {
    var instance = Klass.instancePool.pop();
    Klass.call(instance, a1, a2);
    return instance;
  } else {
    return new Klass(a1, a2);
  }
};
 
var threeArgumentPooler = function (a1, a2, a3) {
  var Klass = this;
  if (Klass.instancePool.length) {
    var instance = Klass.instancePool.pop();
    Klass.call(instance, a1, a2, a3);
    return instance;
  } else {
    return new Klass(a1, a2, a3);
  }
};
 
var fourArgumentPooler = function (a1, a2, a3, a4) {
  var Klass = this;
  if (Klass.instancePool.length) {
    var instance = Klass.instancePool.pop();
    Klass.call(instance, a1, a2, a3, a4);
    return instance;
  } else {
    return new Klass(a1, a2, a3, a4);
  }
};
 
var standardReleaser = function (instance) {
  var Klass = this;
  !(instance instanceof Klass) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Trying to release an instance into a pool of a different type.') : _prodInvariant('25') : void 0;
  instance.destructor();
  if (Klass.instancePool.length < Klass.poolSize) {
    Klass.instancePool.push(instance);
  }
};
 
var DEFAULT_POOL_SIZE = 10;
var DEFAULT_POOLER = oneArgumentPooler;
 
/**
 * Augments `CopyConstructor` to be a poolable class, augmenting only the class
 * itself (statically) not adding any prototypical fields. Any CopyConstructor
 * you give this may have a `poolSize` property, and will look for a
 * prototypical `destructor` on instances.
 *
 * @param {Function} CopyConstructor Constructor that can be used to reset.
 * @param {Function} pooler Customizable pooler.
 */
var addPoolingTo = function (CopyConstructor, pooler) {
  // Casting as any so that flow ignores the actual implementation and trusts
  // it to match the type we declared
  var NewKlass = CopyConstructor;
  NewKlass.instancePool = [];
  NewKlass.getPooled = pooler || DEFAULT_POOLER;
  Eif (!NewKlass.poolSize) {
    NewKlass.poolSize = DEFAULT_POOL_SIZE;
  }
  NewKlass.release = standardReleaser;
  return NewKlass;
};
 
var PooledClass = {
  addPoolingTo: addPoolingTo,
  oneArgumentPooler: oneArgumentPooler,
  twoArgumentPooler: twoArgumentPooler,
  threeArgumentPooler: threeArgumentPooler,
  fourArgumentPooler: fourArgumentPooler
};
 
module.exports = PooledClass;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var REACT_ELEMENT_TYPE = require('./ReactElementSymbol');
 
var _require = require('./ReactCoroutine'),
    REACT_COROUTINE_TYPE = _require.REACT_COROUTINE_TYPE,
    REACT_YIELD_TYPE = _require.REACT_YIELD_TYPE;
 
var ReactFiber = require('./ReactFiber');
var ReactReifiedYield = require('./ReactReifiedYield');
 
var cloneFiber = ReactFiber.cloneFiber,
    createFiberFromElement = ReactFiber.createFiberFromElement,
    createFiberFromCoroutine = ReactFiber.createFiberFromCoroutine,
    createFiberFromYield = ReactFiber.createFiberFromYield;
var createReifiedYield = ReactReifiedYield.createReifiedYield;
 
 
var isArray = Array.isArray;
 
function ChildReconciler(shouldClone) {
 
  function createSubsequentChild(returnFiber, existingChild, previousSibling, newChildren, priority) {
    if (typeof newChildren !== 'object' || newChildren === null) {
      return previousSibling;
    }
 
    switch (newChildren.$$typeof) {
      case REACT_ELEMENT_TYPE:
        {
          var element = newChildren;
          if (existingChild && element.type === existingChild.type && element.key === existingChild.key) {
            // TODO: This is not sufficient since previous siblings could be new.
            // Will fix reconciliation properly later.
            var clone = shouldClone ? cloneFiber(existingChild, priority) : existingChild;
            if (!shouldClone) {
              // TODO: This might be lowering the priority of nested unfinished work.
              clone.pendingWorkPriority = priority;
            }
            clone.pendingProps = element.props;
            clone.sibling = null;
            clone['return'] = returnFiber;
            previousSibling.sibling = clone;
            return clone;
          }
          var child = createFiberFromElement(element, priority);
          previousSibling.sibling = child;
          child['return'] = returnFiber;
          return child;
        }
 
      case REACT_COROUTINE_TYPE:
        {
          var coroutine = newChildren;
          var _child = createFiberFromCoroutine(coroutine, priority);
          previousSibling.sibling = _child;
          _child['return'] = returnFiber;
          return _child;
        }
 
      case REACT_YIELD_TYPE:
        {
          var yieldNode = newChildren;
          var reifiedYield = createReifiedYield(yieldNode);
          var _child2 = createFiberFromYield(yieldNode, priority);
          _child2.output = reifiedYield;
          previousSibling.sibling = _child2;
          _child2['return'] = returnFiber;
          return _child2;
        }
    }
 
    if (isArray(newChildren)) {
      var prev = previousSibling;
      var existing = existingChild;
      for (var i = 0; i < newChildren.length; i++) {
        var nextExisting = existing && existing.sibling;
        prev = createSubsequentChild(returnFiber, existing, prev, newChildren[i], priority);
        if (prev && existing) {
          // TODO: This is not correct because there could've been more
          // than one sibling consumed but I don't want to return a tuple.
          existing = nextExisting;
        }
      }
      return prev;
    } else {
      // TODO: Throw for unknown children.
      return previousSibling;
    }
  }
 
  function createFirstChild(returnFiber, existingChild, newChildren, priority) {
    if (typeof newChildren !== 'object' || newChildren === null) {
      return null;
    }
 
    switch (newChildren.$$typeof) {
      case REACT_ELEMENT_TYPE:
        {
          /* $FlowFixMe(>=0.31.0): This is an unsafe cast. Consider adding a type
           *                       annotation to the `newChildren` param of this
           *                       function.
           */
          var element = newChildren;
          if (existingChild && element.type === existingChild.type && element.key === existingChild.key) {
            // Get the clone of the existing fiber.
            var clone = shouldClone ? cloneFiber(existingChild, priority) : existingChild;
            if (!shouldClone) {
              // TODO: This might be lowering the priority of nested unfinished work.
              clone.pendingWorkPriority = priority;
            }
            clone.pendingProps = element.props;
            clone.sibling = null;
            clone['return'] = returnFiber;
            return clone;
          }
          var child = createFiberFromElement(element, priority);
          child['return'] = returnFiber;
          return child;
        }
 
      case REACT_COROUTINE_TYPE:
        {
          /* $FlowFixMe(>=0.31.0): No 'handler' property found in object type
           */
          var coroutine = newChildren;
          var _child3 = createFiberFromCoroutine(coroutine, priority);
          _child3['return'] = returnFiber;
          return _child3;
        }
 
      case REACT_YIELD_TYPE:
        {
          // A yield results in a fragment fiber whose output is the continuation.
          // TODO: When there is only a single child, we can optimize this to avoid
          // the fragment.
          /* $FlowFixMe(>=0.31.0): No 'continuation' property found in object
           * type
           */
          var yieldNode = newChildren;
          var reifiedYield = createReifiedYield(yieldNode);
          var _child4 = createFiberFromYield(yieldNode, priority);
          _child4.output = reifiedYield;
          _child4['return'] = returnFiber;
          return _child4;
        }
    }
 
    if (isArray(newChildren)) {
      var first = null;
      var prev = null;
      var existing = existingChild;
      /* $FlowIssue(>=0.31.0) #12747709
       *
       * `Array.isArray` is matched syntactically for now until predicate
       * support is complete.
       */
      for (var i = 0; i < newChildren.length; i++) {
        var nextExisting = existing && existing.sibling;
        if (prev == null) {
          prev = createFirstChild(returnFiber, existing, newChildren[i], priority);
          first = prev;
        } else {
          prev = createSubsequentChild(returnFiber, existing, prev, newChildren[i], priority);
        }
        if (prev && existing) {
          // TODO: This is not correct because there could've been more
          // than one sibling consumed but I don't want to return a tuple.
          existing = nextExisting;
        }
      }
      return first;
    } else {
      // TODO: Throw for unknown children.
      return null;
    }
  }
 
  // TODO: This API won't work because we'll need to transfer the side-effects of
  // unmounting children to the returnFiber.
  function reconcileChildFibers(returnFiber, currentFirstChild, newChildren, priority) {
    return createFirstChild(returnFiber, currentFirstChild, newChildren, priority);
  }
 
  return reconcileChildFibers;
}
 
exports.reconcileChildFibers = ChildReconciler(true);
 
exports.reconcileChildFibersInPlace = ChildReconciler(false);
 
function cloneSiblings(current, workInProgress, returnFiber) {
  workInProgress['return'] = returnFiber;
  while (current.sibling) {
    current = current.sibling;
    workInProgress = workInProgress.sibling = cloneFiber(current, current.pendingWorkPriority);
    workInProgress['return'] = returnFiber;
  }
  workInProgress.sibling = null;
}
 
exports.cloneChildFibers = function (current, workInProgress) {
  if (!workInProgress.child) {
    return;
  }
  if (current && workInProgress.child === current.child) {
    // We use workInProgress.child since that lets Flow know that it can't be
    // null since we validated that already. However, as the line above suggests
    // they're actually the same thing.
    var currentChild = workInProgress.child;
    // TODO: This used to reset the pending priority. Not sure if that is needed.
    // workInProgress.pendingWorkPriority = current.pendingWorkPriority;
    // TODO: The below priority used to be set to NoWork which would've
    // dropped work. This is currently unobservable but will become
    // observable when the first sibling has lower priority work remaining
    // than the next sibling. At that point we should add tests that catches
    // this.
    var newChild = cloneFiber(currentChild, currentChild.pendingWorkPriority);
    workInProgress.child = newChild;
    cloneSiblings(currentChild, newChild, workInProgress);
  }
 
  // If there is no alternate, then we don't need to clone the children.
  // If the children of the alternate fiber is a different set, then we don't
  // need to clone. We need to reset the return fiber though since we'll
  // traverse down into them.
  var child = workInProgress.child;
  while (child) {
    child['return'] = workInProgress;
    child = child.sibling;
  }
};
 

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1
 
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1
 
/**
 * Copyright 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var ReactReconciler = require('./ReactReconciler');
 
var instantiateReactComponent = require('./instantiateReactComponent');
var KeyEscapeUtils = require('./KeyEscapeUtils');
var shouldUpdateReactComponent = require('./shouldUpdateReactComponent');
var traverseAllChildren = require('./traverseAllChildren');
var warning = require('fbjs/lib/warning');
 
var ReactComponentTreeHook;
 
Eif (typeof process !== 'undefined' && process.env && process.env.NODE_ENV === 'test') {
  // Temporary hack.
  // Inline requires don't work well with Jest:
  // https://github.com/facebook/react/issues/7240
  // Remove the inline requires when we don't need them anymore:
  // https://github.com/facebook/react/pull/7178
  ReactComponentTreeHook = require('react/lib/ReactComponentTreeHook');
}
 
function instantiateChild(childInstances, child, name, selfDebugID) {
  // We found a component instance.
  var keyUnique = childInstances[name] === undefined;
  if (process.env.NODE_ENV !== 'production') {
    if (!ReactComponentTreeHook) {
      ReactComponentTreeHook = require('react/lib/ReactComponentTreeHook');
    }
    if (!keyUnique) {
      process.env.NODE_ENV !== 'production' ? warning(false, 'flattenChildren(...): Encountered two children with the same key, ' + '`%s`. Child keys must be unique; when two children share a key, only ' + 'the first child will be used.%s', KeyEscapeUtils.unescape(name), ReactComponentTreeHook.getStackAddendumByID(selfDebugID)) : void 0;
    }
  }
  if (child != null && keyUnique) {
    childInstances[name] = instantiateReactComponent(child, true);
  }
}
 
/**
 * ReactChildReconciler provides helpers for initializing or updating a set of
 * children. Its output is suitable for passing it onto ReactMultiChild which
 * does diffed reordering and insertion.
 */
var ReactChildReconciler = {
  /**
   * Generates a "mount image" for each of the supplied children. In the case
   * of `ReactDOMComponent`, a mount image is a string of markup.
   *
   * @param {?object} nestedChildNodes Nested child maps.
   * @return {?object} A set of child instances.
   * @internal
   */
  instantiateChildren: function (nestedChildNodes, transaction, context, selfDebugID // 0 in production and for roots
  ) {
    if (nestedChildNodes == null) {
      return null;
    }
    var childInstances = {};
 
    if (process.env.NODE_ENV !== 'production') {
      traverseAllChildren(nestedChildNodes, function (childInsts, child, name) {
        return instantiateChild(childInsts, child, name, selfDebugID);
      }, childInstances);
    } else {
      traverseAllChildren(nestedChildNodes, instantiateChild, childInstances);
    }
    return childInstances;
  },
 
  /**
   * Updates the rendered children and returns a new set of children.
   *
   * @param {?object} prevChildren Previously initialized set of children.
   * @param {?object} nextChildren Flat child element maps.
   * @param {ReactReconcileTransaction} transaction
   * @param {object} context
   * @return {?object} A new set of child instances.
   * @internal
   */
  updateChildren: function (prevChildren, nextChildren, mountImages, removedNodes, transaction, hostParent, hostContainerInfo, context, selfDebugID // 0 in production and for roots
  ) {
    // We currently don't have a way to track moves here but if we use iterators
    // instead of for..in we can zip the iterators and check if an item has
    // moved.
    // TODO: If nothing has changed, return the prevChildren object so that we
    // can quickly bailout if nothing has changed.
    if (!nextChildren && !prevChildren) {
      return;
    }
    var name;
    var prevChild;
    for (name in nextChildren) {
      if (!nextChildren.hasOwnProperty(name)) {
        continue;
      }
      prevChild = prevChildren && prevChildren[name];
      var prevElement = prevChild && prevChild._currentElement;
      var nextElement = nextChildren[name];
      if (prevChild != null && shouldUpdateReactComponent(prevElement, nextElement)) {
        ReactReconciler.receiveComponent(prevChild, nextElement, transaction, context);
        nextChildren[name] = prevChild;
      } else {
        if (prevChild) {
          removedNodes[name] = ReactReconciler.getHostNode(prevChild);
          ReactReconciler.unmountComponent(prevChild, false);
        }
        // The child must be instantiated before it's mounted.
        var nextChildInstance = instantiateReactComponent(nextElement, true);
        nextChildren[name] = nextChildInstance;
        // Creating mount image now ensures refs are resolved in right order
        // (see https://github.com/facebook/react/pull/7101 for explanation).
        var nextChildMountImage = ReactReconciler.mountComponent(nextChildInstance, transaction, hostParent, hostContainerInfo, context, selfDebugID);
        mountImages.push(nextChildMountImage);
      }
    }
    // Unmount children that are no longer present.
    for (name in prevChildren) {
      if (prevChildren.hasOwnProperty(name) && !(nextChildren && nextChildren.hasOwnProperty(name))) {
        prevChild = prevChildren[name];
        removedNodes[name] = ReactReconciler.getHostNode(prevChild);
        ReactReconciler.unmountComponent(prevChild, false);
      }
    }
  },
 
  /**
   * Unmounts all rendered children. This should be used to clean up children
   * when this component is unmounted.
   *
   * @param {?object} renderedChildren Previously initialized set of children.
   * @internal
   */
  unmountChildren: function (renderedChildren, safely) {
    for (var name in renderedChildren) {
      if (renderedChildren.hasOwnProperty(name)) {
        var renderedChild = renderedChildren[name];
        ReactReconciler.unmountComponent(renderedChild, safely);
      }
    }
  }
 
};
 
module.exports = ReactChildReconciler;
 

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/**
 * Copyright 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var _prodInvariant = require('./reactProdInvariant');
 
var invariant = require('fbjs/lib/invariant');
 
var injected = false;
 
var ReactComponentEnvironment = {
 
  /**
   * Optionally injectable hook for swapping out mount images in the middle of
   * the tree.
   */
  replaceNodeWithMarkup: null,
 
  /**
   * Optionally injectable hook for processing a queue of child updates. Will
   * later move into MultiChildComponents.
   */
  processChildrenUpdates: null,
 
  injection: {
    injectEnvironment: function (environment) {
      !!injected ? process.env.NODE_ENV !== 'production' ? invariant(false, 'ReactCompositeComponent: injectEnvironment() can only be called once.') : _prodInvariant('104') : void 0;
      ReactComponentEnvironment.replaceNodeWithMarkup = environment.replaceNodeWithMarkup;
      ReactComponentEnvironment.processChildrenUpdates = environment.processChildrenUpdates;
      injected = true;
    }
  }
 
};
 
module.exports = ReactComponentEnvironment;
 

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1
 
/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var _prodInvariant = require('./reactProdInvariant'),
    _assign = require('object-assign');
 
var React = require('react/lib/React');
var ReactComponentEnvironment = require('./ReactComponentEnvironment');
var ReactCurrentOwner = require('react/lib/ReactCurrentOwner');
var ReactErrorUtils = require('./ReactErrorUtils');
var ReactInstanceMap = require('./ReactInstanceMap');
var ReactInstrumentation = require('./ReactInstrumentation');
var ReactNodeTypes = require('./ReactNodeTypes');
var ReactReconciler = require('./ReactReconciler');
 
Eif (process.env.NODE_ENV !== 'production') {
  var checkReactTypeSpec = require('./checkReactTypeSpec');
}
 
var emptyObject = require('fbjs/lib/emptyObject');
var invariant = require('fbjs/lib/invariant');
var shallowEqual = require('fbjs/lib/shallowEqual');
var shouldUpdateReactComponent = require('./shouldUpdateReactComponent');
var warning = require('fbjs/lib/warning');
 
var CompositeTypes = {
  ImpureClass: 0,
  PureClass: 1,
  StatelessFunctional: 2
};
 
function StatelessComponent(Component) {}
StatelessComponent.prototype.render = function () {
  var Component = ReactInstanceMap.get(this)._currentElement.type;
  var element = Component(this.props, this.context, this.updater);
  warnIfInvalidElement(Component, element);
  return element;
};
 
function warnIfInvalidElement(Component, element) {
  if (process.env.NODE_ENV !== 'production') {
    process.env.NODE_ENV !== 'production' ? warning(element === null || element === false || React.isValidElement(element), '%s(...): A valid React element (or null) must be returned. You may have ' + 'returned undefined, an array or some other invalid object.', Component.displayName || Component.name || 'Component') : void 0;
    process.env.NODE_ENV !== 'production' ? warning(!Component.childContextTypes, '%s(...): childContextTypes cannot be defined on a functional component.', Component.displayName || Component.name || 'Component') : void 0;
  }
}
 
function shouldConstruct(Component) {
  return !!(Component.prototype && Component.prototype.isReactComponent);
}
 
function isPureComponent(Component) {
  return !!(Component.prototype && Component.prototype.isPureReactComponent);
}
 
// Separated into a function to contain deoptimizations caused by try/finally.
function measureLifeCyclePerf(fn, debugID, timerType) {
  if (debugID === 0) {
    // Top-level wrappers (see ReactMount) and empty components (see
    // ReactDOMEmptyComponent) are invisible to hooks and devtools.
    // Both are implementation details that should go away in the future.
    return fn();
  }
 
  ReactInstrumentation.debugTool.onBeginLifeCycleTimer(debugID, timerType);
  try {
    return fn();
  } finally {
    ReactInstrumentation.debugTool.onEndLifeCycleTimer(debugID, timerType);
  }
}
 
/**
 * ------------------ The Life-Cycle of a Composite Component ------------------
 *
 * - constructor: Initialization of state. The instance is now retained.
 *   - componentWillMount
 *   - render
 *   - [children's constructors]
 *     - [children's componentWillMount and render]
 *     - [children's componentDidMount]
 *     - componentDidMount
 *
 *       Update Phases:
 *       - componentWillReceiveProps (only called if parent updated)
 *       - shouldComponentUpdate
 *         - componentWillUpdate
 *           - render
 *           - [children's constructors or receive props phases]
 *         - componentDidUpdate
 *
 *     - componentWillUnmount
 *     - [children's componentWillUnmount]
 *   - [children destroyed]
 * - (destroyed): The instance is now blank, released by React and ready for GC.
 *
 * -----------------------------------------------------------------------------
 */
 
/**
 * An incrementing ID assigned to each component when it is mounted. This is
 * used to enforce the order in which `ReactUpdates` updates dirty components.
 *
 * @private
 */
var nextMountID = 1;
 
/**
 * @lends {ReactCompositeComponent.prototype}
 */
var ReactCompositeComponent = {
 
  /**
   * Base constructor for all composite component.
   *
   * @param {ReactElement} element
   * @final
   * @internal
   */
  construct: function (element) {
    this._currentElement = element;
    this._rootNodeID = 0;
    this._compositeType = null;
    this._instance = null;
    this._hostParent = null;
    this._hostContainerInfo = null;
 
    // See ReactUpdateQueue
    this._updateBatchNumber = null;
    this._pendingElement = null;
    this._pendingStateQueue = null;
    this._pendingReplaceState = false;
    this._pendingForceUpdate = false;
 
    this._renderedNodeType = null;
    this._renderedComponent = null;
    this._context = null;
    this._mountOrder = 0;
    this._topLevelWrapper = null;
 
    // See ReactUpdates and ReactUpdateQueue.
    this._pendingCallbacks = null;
 
    // ComponentWillUnmount shall only be called once
    this._calledComponentWillUnmount = false;
 
    if (process.env.NODE_ENV !== 'production') {
      this._warnedAboutRefsInRender = false;
    }
  },
 
  /**
   * Initializes the component, renders markup, and registers event listeners.
   *
   * @param {ReactReconcileTransaction|ReactServerRenderingTransaction} transaction
   * @param {?object} hostParent
   * @param {?object} hostContainerInfo
   * @param {?object} context
   * @return {?string} Rendered markup to be inserted into the DOM.
   * @final
   * @internal
   */
  mountComponent: function (transaction, hostParent, hostContainerInfo, context) {
    var _this = this;
 
    this._context = context;
    this._mountOrder = nextMountID++;
    this._hostParent = hostParent;
    this._hostContainerInfo = hostContainerInfo;
 
    var publicProps = this._currentElement.props;
    var publicContext = this._processContext(context);
 
    var Component = this._currentElement.type;
 
    var updateQueue = transaction.getUpdateQueue();
 
    // Initialize the public class
    var doConstruct = shouldConstruct(Component);
    var inst = this._constructComponent(doConstruct, publicProps, publicContext, updateQueue);
    var renderedElement;
 
    // Support functional components
    if (!doConstruct && (inst == null || inst.render == null)) {
      renderedElement = inst;
      warnIfInvalidElement(Component, renderedElement);
      !(inst === null || inst === false || React.isValidElement(inst)) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s(...): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.', Component.displayName || Component.name || 'Component') : _prodInvariant('105', Component.displayName || Component.name || 'Component') : void 0;
      inst = new StatelessComponent(Component);
      this._compositeType = CompositeTypes.StatelessFunctional;
    } else {
      if (isPureComponent(Component)) {
        this._compositeType = CompositeTypes.PureClass;
      } else {
        this._compositeType = CompositeTypes.ImpureClass;
      }
    }
 
    if (process.env.NODE_ENV !== 'production') {
      // This will throw later in _renderValidatedComponent, but add an early
      // warning now to help debugging
      if (inst.render == null) {
        process.env.NODE_ENV !== 'production' ? warning(false, '%s(...): No `render` method found on the returned component ' + 'instance: you may have forgotten to define `render`.', Component.displayName || Component.name || 'Component') : void 0;
      }
 
      var propsMutated = inst.props !== publicProps;
      var componentName = Component.displayName || Component.name || 'Component';
 
      process.env.NODE_ENV !== 'production' ? warning(inst.props === undefined || !propsMutated, '%s(...): When calling super() in `%s`, make sure to pass ' + 'up the same props that your component\'s constructor was passed.', componentName, componentName) : void 0;
    }
 
    // These should be set up in the constructor, but as a convenience for
    // simpler class abstractions, we set them up after the fact.
    inst.props = publicProps;
    inst.context = publicContext;
    inst.refs = emptyObject;
    inst.updater = updateQueue;
 
    this._instance = inst;
 
    // Store a reference from the instance back to the internal representation
    ReactInstanceMap.set(inst, this);
 
    if (process.env.NODE_ENV !== 'production') {
      // Since plain JS classes are defined without any special initialization
      // logic, we can not catch common errors early. Therefore, we have to
      // catch them here, at initialization time, instead.
      process.env.NODE_ENV !== 'production' ? warning(!inst.getInitialState || inst.getInitialState.isReactClassApproved || inst.state, 'getInitialState was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Did you mean to define a state property instead?', this.getName() || 'a component') : void 0;
      process.env.NODE_ENV !== 'production' ? warning(!inst.getDefaultProps || inst.getDefaultProps.isReactClassApproved, 'getDefaultProps was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Use a static property to define defaultProps instead.', this.getName() || 'a component') : void 0;
      process.env.NODE_ENV !== 'production' ? warning(!inst.propTypes, 'propTypes was defined as an instance property on %s. Use a static ' + 'property to define propTypes instead.', this.getName() || 'a component') : void 0;
      process.env.NODE_ENV !== 'production' ? warning(!inst.contextTypes, 'contextTypes was defined as an instance property on %s. Use a ' + 'static property to define contextTypes instead.', this.getName() || 'a component') : void 0;
      process.env.NODE_ENV !== 'production' ? warning(typeof inst.componentShouldUpdate !== 'function', '%s has a method called ' + 'componentShouldUpdate(). Did you mean shouldComponentUpdate()? ' + 'The name is phrased as a question because the function is ' + 'expected to return a value.', this.getName() || 'A component') : void 0;
      process.env.NODE_ENV !== 'production' ? warning(typeof inst.componentDidUnmount !== 'function', '%s has a method called ' + 'componentDidUnmount(). But there is no such lifecycle method. ' + 'Did you mean componentWillUnmount()?', this.getName() || 'A component') : void 0;
      process.env.NODE_ENV !== 'production' ? warning(typeof inst.componentWillRecieveProps !== 'function', '%s has a method called ' + 'componentWillRecieveProps(). Did you mean componentWillReceiveProps()?', this.getName() || 'A component') : void 0;
    }
 
    var initialState = inst.state;
    if (initialState === undefined) {
      inst.state = initialState = null;
    }
    !(typeof initialState === 'object' && !Array.isArray(initialState)) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.state: must be set to an object or null', this.getName() || 'ReactCompositeComponent') : _prodInvariant('106', this.getName() || 'ReactCompositeComponent') : void 0;
 
    this._pendingStateQueue = null;
    this._pendingReplaceState = false;
    this._pendingForceUpdate = false;
 
    var markup;
    if (inst.unstable_handleError) {
      markup = this.performInitialMountWithErrorHandling(renderedElement, hostParent, hostContainerInfo, transaction, context);
    } else {
      markup = this.performInitialMount(renderedElement, hostParent, hostContainerInfo, transaction, context);
    }
 
    if (inst.componentDidMount) {
      if (process.env.NODE_ENV !== 'production') {
        transaction.getReactMountReady().enqueue(function () {
          measureLifeCyclePerf(function () {
            return inst.componentDidMount();
          }, _this._debugID, 'componentDidMount');
        });
      } else {
        transaction.getReactMountReady().enqueue(inst.componentDidMount, inst);
      }
    }
 
    return markup;
  },
 
  _constructComponent: function (doConstruct, publicProps, publicContext, updateQueue) {
    if (process.env.NODE_ENV !== 'production') {
      ReactCurrentOwner.current = this;
      try {
        return this._constructComponentWithoutOwner(doConstruct, publicProps, publicContext, updateQueue);
      } finally {
        ReactCurrentOwner.current = null;
      }
    } else {
      return this._constructComponentWithoutOwner(doConstruct, publicProps, publicContext, updateQueue);
    }
  },
 
  _constructComponentWithoutOwner: function (doConstruct, publicProps, publicContext, updateQueue) {
    var Component = this._currentElement.type;
 
    if (doConstruct) {
      if (process.env.NODE_ENV !== 'production') {
        return measureLifeCyclePerf(function () {
          return new Component(publicProps, publicContext, updateQueue);
        }, this._debugID, 'ctor');
      } else {
        return new Component(publicProps, publicContext, updateQueue);
      }
    }
 
    // This can still be an instance in case of factory components
    // but we'll count this as time spent rendering as the more common case.
    if (process.env.NODE_ENV !== 'production') {
      return measureLifeCyclePerf(function () {
        return Component(publicProps, publicContext, updateQueue);
      }, this._debugID, 'render');
    } else {
      return Component(publicProps, publicContext, updateQueue);
    }
  },
 
  performInitialMountWithErrorHandling: function (renderedElement, hostParent, hostContainerInfo, transaction, context) {
    var markup;
    var checkpoint = transaction.checkpoint();
    try {
      markup = this.performInitialMount(renderedElement, hostParent, hostContainerInfo, transaction, context);
    } catch (e) {
      // Roll back to checkpoint, handle error (which may add items to the transaction), and take a new checkpoint
      transaction.rollback(checkpoint);
      this._instance.unstable_handleError(e);
      if (this._pendingStateQueue) {
        this._instance.state = this._processPendingState(this._instance.props, this._instance.context);
      }
      checkpoint = transaction.checkpoint();
 
      this._renderedComponent.unmountComponent(true);
      transaction.rollback(checkpoint);
 
      // Try again - we've informed the component about the error, so they can render an error message this time.
      // If this throws again, the error will bubble up (and can be caught by a higher error boundary).
      markup = this.performInitialMount(renderedElement, hostParent, hostContainerInfo, transaction, context);
    }
    return markup;
  },
 
  performInitialMount: function (renderedElement, hostParent, hostContainerInfo, transaction, context) {
    var inst = this._instance;
 
    var debugID = 0;
    if (process.env.NODE_ENV !== 'production') {
      debugID = this._debugID;
    }
 
    if (inst.componentWillMount) {
      if (process.env.NODE_ENV !== 'production') {
        measureLifeCyclePerf(function () {
          return inst.componentWillMount();
        }, debugID, 'componentWillMount');
      } else {
        inst.componentWillMount();
      }
      // When mounting, calls to `setState` by `componentWillMount` will set
      // `this._pendingStateQueue` without triggering a re-render.
      if (this._pendingStateQueue) {
        inst.state = this._processPendingState(inst.props, inst.context);
      }
    }
 
    // If not a stateless component, we now render
    if (renderedElement === undefined) {
      renderedElement = this._renderValidatedComponent();
    }
 
    var nodeType = ReactNodeTypes.getType(renderedElement);
    this._renderedNodeType = nodeType;
    var child = this._instantiateReactComponent(renderedElement, nodeType !== ReactNodeTypes.EMPTY /* shouldHaveDebugID */
    );
    this._renderedComponent = child;
 
    var markup = ReactReconciler.mountComponent(child, transaction, hostParent, hostContainerInfo, this._processChildContext(context), debugID);
 
    if (process.env.NODE_ENV !== 'production') {
      if (debugID !== 0) {
        var childDebugIDs = child._debugID !== 0 ? [child._debugID] : [];
        ReactInstrumentation.debugTool.onSetChildren(debugID, childDebugIDs);
      }
    }
 
    return markup;
  },
 
  getHostNode: function () {
    return ReactReconciler.getHostNode(this._renderedComponent);
  },
 
  /**
   * Releases any resources allocated by `mountComponent`.
   *
   * @final
   * @internal
   */
  unmountComponent: function (safely) {
    if (!this._renderedComponent) {
      return;
    }
 
    var inst = this._instance;
 
    if (inst.componentWillUnmount && !inst._calledComponentWillUnmount) {
      inst._calledComponentWillUnmount = true;
 
      if (safely) {
        var name = this.getName() + '.componentWillUnmount()';
        ReactErrorUtils.invokeGuardedCallback(name, inst.componentWillUnmount.bind(inst));
      } else {
        if (process.env.NODE_ENV !== 'production') {
          measureLifeCyclePerf(function () {
            return inst.componentWillUnmount();
          }, this._debugID, 'componentWillUnmount');
        } else {
          inst.componentWillUnmount();
        }
      }
    }
 
    if (this._renderedComponent) {
      ReactReconciler.unmountComponent(this._renderedComponent, safely);
      this._renderedNodeType = null;
      this._renderedComponent = null;
      this._instance = null;
    }
 
    // Reset pending fields
    // Even if this component is scheduled for another update in ReactUpdates,
    // it would still be ignored because these fields are reset.
    this._pendingStateQueue = null;
    this._pendingReplaceState = false;
    this._pendingForceUpdate = false;
    this._pendingCallbacks = null;
    this._pendingElement = null;
 
    // These fields do not really need to be reset since this object is no
    // longer accessible.
    this._context = null;
    this._rootNodeID = 0;
    this._topLevelWrapper = null;
 
    // Delete the reference from the instance to this internal representation
    // which allow the internals to be properly cleaned up even if the user
    // leaks a reference to the public instance.
    ReactInstanceMap.remove(inst);
 
    // Some existing components rely on inst.props even after they've been
    // destroyed (in event handlers).
    // TODO: inst.props = null;
    // TODO: inst.state = null;
    // TODO: inst.context = null;
  },
 
  /**
   * Filters the context object to only contain keys specified in
   * `contextTypes`
   *
   * @param {object} context
   * @return {?object}
   * @private
   */
  _maskContext: function (context) {
    var Component = this._currentElement.type;
    var contextTypes = Component.contextTypes;
    if (!contextTypes) {
      return emptyObject;
    }
    var maskedContext = {};
    for (var contextName in contextTypes) {
      maskedContext[contextName] = context[contextName];
    }
    return maskedContext;
  },
 
  /**
   * Filters the context object to only contain keys specified in
   * `contextTypes`, and asserts that they are valid.
   *
   * @param {object} context
   * @return {?object}
   * @private
   */
  _processContext: function (context) {
    var maskedContext = this._maskContext(context);
    if (process.env.NODE_ENV !== 'production') {
      var Component = this._currentElement.type;
      if (Component.contextTypes) {
        this._checkContextTypes(Component.contextTypes, maskedContext, 'context');
      }
    }
    return maskedContext;
  },
 
  /**
   * @param {object} currentContext
   * @return {object}
   * @private
   */
  _processChildContext: function (currentContext) {
    var Component = this._currentElement.type;
    var inst = this._instance;
    var childContext;
 
    if (inst.getChildContext) {
      if (process.env.NODE_ENV !== 'production') {
        ReactInstrumentation.debugTool.onBeginProcessingChildContext();
        try {
          childContext = inst.getChildContext();
        } finally {
          ReactInstrumentation.debugTool.onEndProcessingChildContext();
        }
      } else {
        childContext = inst.getChildContext();
      }
    }
 
    if (childContext) {
      !(typeof Component.childContextTypes === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.getChildContext(): childContextTypes must be defined in order to use getChildContext().', this.getName() || 'ReactCompositeComponent') : _prodInvariant('107', this.getName() || 'ReactCompositeComponent') : void 0;
      if (process.env.NODE_ENV !== 'production') {
        this._checkContextTypes(Component.childContextTypes, childContext, 'child context');
      }
      for (var name in childContext) {
        !(name in Component.childContextTypes) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.getChildContext(): key "%s" is not defined in childContextTypes.', this.getName() || 'ReactCompositeComponent', name) : _prodInvariant('108', this.getName() || 'ReactCompositeComponent', name) : void 0;
      }
      return _assign({}, currentContext, childContext);
    }
    return currentContext;
  },
 
  /**
   * Assert that the context types are valid
   *
   * @param {object} typeSpecs Map of context field to a ReactPropType
   * @param {object} values Runtime values that need to be type-checked
   * @param {string} location e.g. "prop", "context", "child context"
   * @private
   */
  _checkContextTypes: function (typeSpecs, values, location) {
    if (process.env.NODE_ENV !== 'production') {
      checkReactTypeSpec(typeSpecs, values, location, this.getName(), null, this._debugID);
    }
  },
 
  receiveComponent: function (nextElement, transaction, nextContext) {
    var prevElement = this._currentElement;
    var prevContext = this._context;
 
    this._pendingElement = null;
 
    this.updateComponent(transaction, prevElement, nextElement, prevContext, nextContext);
  },
 
  /**
   * If any of `_pendingElement`, `_pendingStateQueue`, or `_pendingForceUpdate`
   * is set, update the component.
   *
   * @param {ReactReconcileTransaction} transaction
   * @internal
   */
  performUpdateIfNecessary: function (transaction) {
    if (this._pendingElement != null) {
      ReactReconciler.receiveComponent(this, this._pendingElement, transaction, this._context);
    } else if (this._pendingStateQueue !== null || this._pendingForceUpdate) {
      this.updateComponent(transaction, this._currentElement, this._currentElement, this._context, this._context);
    } else {
      this._updateBatchNumber = null;
    }
  },
 
  /**
   * Perform an update to a mounted component. The componentWillReceiveProps and
   * shouldComponentUpdate methods are called, then (assuming the update isn't
   * skipped) the remaining update lifecycle methods are called and the DOM
   * representation is updated.
   *
   * By default, this implements React's rendering and reconciliation algorithm.
   * Sophisticated clients may wish to override this.
   *
   * @param {ReactReconcileTransaction} transaction
   * @param {ReactElement} prevParentElement
   * @param {ReactElement} nextParentElement
   * @internal
   * @overridable
   */
  updateComponent: function (transaction, prevParentElement, nextParentElement, prevUnmaskedContext, nextUnmaskedContext) {
    var inst = this._instance;
    !(inst != null) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Attempted to update component `%s` that has already been unmounted (or failed to mount).', this.getName() || 'ReactCompositeComponent') : _prodInvariant('136', this.getName() || 'ReactCompositeComponent') : void 0;
 
    var willReceive = false;
    var nextContext;
 
    // Determine if the context has changed or not
    if (this._context === nextUnmaskedContext) {
      nextContext = inst.context;
    } else {
      nextContext = this._processContext(nextUnmaskedContext);
      willReceive = true;
    }
 
    var prevProps = prevParentElement.props;
    var nextProps = nextParentElement.props;
 
    // Not a simple state update but a props update
    if (prevParentElement !== nextParentElement) {
      willReceive = true;
    }
 
    // An update here will schedule an update but immediately set
    // _pendingStateQueue which will ensure that any state updates gets
    // immediately reconciled instead of waiting for the next batch.
    if (willReceive && inst.componentWillReceiveProps) {
      if (process.env.NODE_ENV !== 'production') {
        measureLifeCyclePerf(function () {
          return inst.componentWillReceiveProps(nextProps, nextContext);
        }, this._debugID, 'componentWillReceiveProps');
      } else {
        inst.componentWillReceiveProps(nextProps, nextContext);
      }
    }
 
    var nextState = this._processPendingState(nextProps, nextContext);
    var shouldUpdate = true;
 
    if (!this._pendingForceUpdate) {
      if (inst.shouldComponentUpdate) {
        if (process.env.NODE_ENV !== 'production') {
          shouldUpdate = measureLifeCyclePerf(function () {
            return inst.shouldComponentUpdate(nextProps, nextState, nextContext);
          }, this._debugID, 'shouldComponentUpdate');
        } else {
          shouldUpdate = inst.shouldComponentUpdate(nextProps, nextState, nextContext);
        }
      } else {
        if (this._compositeType === CompositeTypes.PureClass) {
          shouldUpdate = !shallowEqual(prevProps, nextProps) || !shallowEqual(inst.state, nextState);
        }
      }
    }
 
    if (process.env.NODE_ENV !== 'production') {
      process.env.NODE_ENV !== 'production' ? warning(shouldUpdate !== undefined, '%s.shouldComponentUpdate(): Returned undefined instead of a ' + 'boolean value. Make sure to return true or false.', this.getName() || 'ReactCompositeComponent') : void 0;
    }
 
    this._updateBatchNumber = null;
    if (shouldUpdate) {
      this._pendingForceUpdate = false;
      // Will set `this.props`, `this.state` and `this.context`.
      this._performComponentUpdate(nextParentElement, nextProps, nextState, nextContext, transaction, nextUnmaskedContext);
    } else {
      // If it's determined that a component should not update, we still want
      // to set props and state but we shortcut the rest of the update.
      this._currentElement = nextParentElement;
      this._context = nextUnmaskedContext;
      inst.props = nextProps;
      inst.state = nextState;
      inst.context = nextContext;
    }
  },
 
  _processPendingState: function (props, context) {
    var inst = this._instance;
    var queue = this._pendingStateQueue;
    var replace = this._pendingReplaceState;
    this._pendingReplaceState = false;
    this._pendingStateQueue = null;
 
    if (!queue) {
      return inst.state;
    }
 
    if (replace && queue.length === 1) {
      return queue[0];
    }
 
    var nextState = _assign({}, replace ? queue[0] : inst.state);
    for (var i = replace ? 1 : 0; i < queue.length; i++) {
      var partial = queue[i];
      _assign(nextState, typeof partial === 'function' ? partial.call(inst, nextState, props, context) : partial);
    }
 
    return nextState;
  },
 
  /**
   * Merges new props and state, notifies delegate methods of update and
   * performs update.
   *
   * @param {ReactElement} nextElement Next element
   * @param {object} nextProps Next public object to set as properties.
   * @param {?object} nextState Next object to set as state.
   * @param {?object} nextContext Next public object to set as context.
   * @param {ReactReconcileTransaction} transaction
   * @param {?object} unmaskedContext
   * @private
   */
  _performComponentUpdate: function (nextElement, nextProps, nextState, nextContext, transaction, unmaskedContext) {
    var _this2 = this;
 
    var inst = this._instance;
 
    var hasComponentDidUpdate = Boolean(inst.componentDidUpdate);
    var prevProps;
    var prevState;
    var prevContext;
    if (hasComponentDidUpdate) {
      prevProps = inst.props;
      prevState = inst.state;
      prevContext = inst.context;
    }
 
    if (inst.componentWillUpdate) {
      if (process.env.NODE_ENV !== 'production') {
        measureLifeCyclePerf(function () {
          return inst.componentWillUpdate(nextProps, nextState, nextContext);
        }, this._debugID, 'componentWillUpdate');
      } else {
        inst.componentWillUpdate(nextProps, nextState, nextContext);
      }
    }
 
    this._currentElement = nextElement;
    this._context = unmaskedContext;
    inst.props = nextProps;
    inst.state = nextState;
    inst.context = nextContext;
 
    this._updateRenderedComponent(transaction, unmaskedContext);
 
    if (hasComponentDidUpdate) {
      if (process.env.NODE_ENV !== 'production') {
        transaction.getReactMountReady().enqueue(function () {
          measureLifeCyclePerf(inst.componentDidUpdate.bind(inst, prevProps, prevState, prevContext), _this2._debugID, 'componentDidUpdate');
        });
      } else {
        transaction.getReactMountReady().enqueue(inst.componentDidUpdate.bind(inst, prevProps, prevState, prevContext), inst);
      }
    }
  },
 
  /**
   * Call the component's `render` method and update the DOM accordingly.
   *
   * @param {ReactReconcileTransaction} transaction
   * @internal
   */
  _updateRenderedComponent: function (transaction, context) {
    var prevComponentInstance = this._renderedComponent;
    var prevRenderedElement = prevComponentInstance._currentElement;
    var nextRenderedElement = this._renderValidatedComponent();
 
    var debugID = 0;
    if (process.env.NODE_ENV !== 'production') {
      debugID = this._debugID;
    }
 
    if (shouldUpdateReactComponent(prevRenderedElement, nextRenderedElement)) {
      ReactReconciler.receiveComponent(prevComponentInstance, nextRenderedElement, transaction, this._processChildContext(context));
    } else {
      var oldHostNode = ReactReconciler.getHostNode(prevComponentInstance);
      ReactReconciler.unmountComponent(prevComponentInstance, false);
 
      var nodeType = ReactNodeTypes.getType(nextRenderedElement);
      this._renderedNodeType = nodeType;
      var child = this._instantiateReactComponent(nextRenderedElement, nodeType !== ReactNodeTypes.EMPTY /* shouldHaveDebugID */
      );
      this._renderedComponent = child;
 
      var nextMarkup = ReactReconciler.mountComponent(child, transaction, this._hostParent, this._hostContainerInfo, this._processChildContext(context), debugID);
 
      if (process.env.NODE_ENV !== 'production') {
        if (debugID !== 0) {
          var childDebugIDs = child._debugID !== 0 ? [child._debugID] : [];
          ReactInstrumentation.debugTool.onSetChildren(debugID, childDebugIDs);
        }
      }
 
      this._replaceNodeWithMarkup(oldHostNode, nextMarkup, prevComponentInstance);
    }
  },
 
  /**
   * Overridden in shallow rendering.
   *
   * @protected
   */
  _replaceNodeWithMarkup: function (oldHostNode, nextMarkup, prevInstance) {
    ReactComponentEnvironment.replaceNodeWithMarkup(oldHostNode, nextMarkup, prevInstance);
  },
 
  /**
   * @protected
   */
  _renderValidatedComponentWithoutOwnerOrContext: function () {
    var inst = this._instance;
    var renderedElement;
 
    if (process.env.NODE_ENV !== 'production') {
      renderedElement = measureLifeCyclePerf(function () {
        return inst.render();
      }, this._debugID, 'render');
    } else {
      renderedElement = inst.render();
    }
 
    if (process.env.NODE_ENV !== 'production') {
      // We allow auto-mocks to proceed as if they're returning null.
      if (renderedElement === undefined && inst.render._isMockFunction) {
        // This is probably bad practice. Consider warning here and
        // deprecating this convenience.
        renderedElement = null;
      }
    }
 
    return renderedElement;
  },
 
  /**
   * @private
   */
  _renderValidatedComponent: function () {
    var renderedElement;
    if (process.env.NODE_ENV !== 'production' || this._compositeType !== CompositeTypes.StatelessFunctional) {
      ReactCurrentOwner.current = this;
      try {
        renderedElement = this._renderValidatedComponentWithoutOwnerOrContext();
      } finally {
        ReactCurrentOwner.current = null;
      }
    } else {
      renderedElement = this._renderValidatedComponentWithoutOwnerOrContext();
    }
    !(
    // TODO: An `isValidNode` function would probably be more appropriate
    renderedElement === null || renderedElement === false || React.isValidElement(renderedElement)) ? process.env.NODE_ENV !== 'production' ? invariant(false, '%s.render(): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.', this.getName() || 'ReactCompositeComponent') : _prodInvariant('109', this.getName() || 'ReactCompositeComponent') : void 0;
 
    return renderedElement;
  },
 
  /**
   * Lazily allocates the refs object and stores `component` as `ref`.
   *
   * @param {string} ref Reference name.
   * @param {component} component Component to store as `ref`.
   * @final
   * @private
   */
  attachRef: function (ref, component) {
    var inst = this.getPublicInstance();
    !(inst != null) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Stateless function components cannot have refs.') : _prodInvariant('110') : void 0;
    var publicComponentInstance = component.getPublicInstance();
    if (process.env.NODE_ENV !== 'production') {
      var componentName = component && component.getName ? component.getName() : 'a component';
      process.env.NODE_ENV !== 'production' ? warning(publicComponentInstance != null || component._compositeType !== CompositeTypes.StatelessFunctional, 'Stateless function components cannot be given refs ' + '(See ref "%s" in %s created by %s). ' + 'Attempts to access this ref will fail.', ref, componentName, this.getName()) : void 0;
    }
    var refs = inst.refs === emptyObject ? inst.refs = {} : inst.refs;
    refs[ref] = publicComponentInstance;
  },
 
  /**
   * Detaches a reference name.
   *
   * @param {string} ref Name to dereference.
   * @final
   * @private
   */
  detachRef: function (ref) {
    var refs = this.getPublicInstance().refs;
    delete refs[ref];
  },
 
  /**
   * Get a text description of the component that can be used to identify it
   * in error messages.
   * @return {string} The name or null.
   * @internal
   */
  getName: function () {
    var type = this._currentElement.type;
    var constructor = this._instance && this._instance.constructor;
    return type.displayName || constructor && constructor.displayName || type.name || constructor && constructor.name || null;
  },
 
  /**
   * Get the publicly accessible representation of this component - i.e. what
   * is exposed by refs and returned by render. Can be null for stateless
   * components.
   *
   * @return {ReactComponent} the public component instance.
   * @internal
   */
  getPublicInstance: function () {
    var inst = this._instance;
    if (this._compositeType === CompositeTypes.StatelessFunctional) {
      return null;
    }
    return inst;
  },
 
  // Stub
  _instantiateReactComponent: null
 
};
 
module.exports = ReactCompositeComponent;
 

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/**
 * Copyright 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
// The Symbol used to tag the special React types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_COROUTINE_TYPE = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.coroutine') || 0xeac8;
 
var REACT_YIELD_TYPE = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.yield') || 0xeac9;
 
exports.createCoroutine = function (children, handler, props) {
  var key = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
 
  var coroutine = {
    // This tag allow us to uniquely identify this as a React Coroutine
    $$typeof: REACT_COROUTINE_TYPE,
    key: key == null ? null : '' + key,
    children: children,
    handler: handler,
    props: props
  };
 
  if (process.env.NODE_ENV !== 'production') {
    // TODO: Add _store property for marking this as validated.
    if (Object.freeze) {
      Object.freeze(coroutine.props);
      Object.freeze(coroutine);
    }
  }
 
  return coroutine;
};
 
exports.createYield = function (props, continuation) {
  var key = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
 
  var yieldNode = {
    // This tag allow us to uniquely identify this as a React Yield
    $$typeof: REACT_YIELD_TYPE,
    key: key == null ? null : '' + key,
    props: props,
    continuation: continuation
  };
 
  if (process.env.NODE_ENV !== 'production') {
    // TODO: Add _store property for marking this as validated.
    if (Object.freeze) {
      Object.freeze(yieldNode.props);
      Object.freeze(yieldNode);
    }
  }
 
  return yieldNode;
};
 
/**
 * Verifies the object is a coroutine object.
 */
exports.isCoroutine = function (object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_COROUTINE_TYPE;
};
 
/**
 * Verifies the object is a yield object.
 */
exports.isYield = function (object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_YIELD_TYPE;
};
 
exports.REACT_YIELD_TYPE = REACT_YIELD_TYPE;
exports.REACT_COROUTINE_TYPE = REACT_COROUTINE_TYPE;
 

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/**
 * Copyright 2016-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var ReactInvalidSetStateWarningHook = require('./ReactInvalidSetStateWarningHook');
var ReactHostOperationHistoryHook = require('./ReactHostOperationHistoryHook');
var ReactComponentTreeHook = require('react/lib/ReactComponentTreeHook');
var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment');
 
var performanceNow = require('fbjs/lib/performanceNow');
var warning = require('fbjs/lib/warning');
 
var hooks = [];
var didHookThrowForEvent = {};
 
function callHook(event, fn, context, arg1, arg2, arg3, arg4, arg5) {
  try {
    fn.call(context, arg1, arg2, arg3, arg4, arg5);
  } catch (e) {
    process.env.NODE_ENV !== 'production' ? warning(didHookThrowForEvent[event], 'Exception thrown by hook while handling %s: %s', event, e + '\n' + e.stack) : void 0;
    didHookThrowForEvent[event] = true;
  }
}
 
function emitEvent(event, arg1, arg2, arg3, arg4, arg5) {
  for (var i = 0; i < hooks.length; i++) {
    var hook = hooks[i];
    var fn = hook[event];
    if (fn) {
      callHook(event, fn, hook, arg1, arg2, arg3, arg4, arg5);
    }
  }
}
 
var isProfiling = false;
var flushHistory = [];
var lifeCycleTimerStack = [];
var currentFlushNesting = 0;
var currentFlushMeasurements = [];
var currentFlushStartTime = 0;
var currentTimerDebugID = null;
var currentTimerStartTime = 0;
var currentTimerNestedFlushDuration = 0;
var currentTimerType = null;
 
var lifeCycleTimerHasWarned = false;
 
function clearHistory() {
  ReactComponentTreeHook.purgeUnmountedComponents();
  ReactHostOperationHistoryHook.clearHistory();
}
 
function getTreeSnapshot(registeredIDs) {
  return registeredIDs.reduce(function (tree, id) {
    var ownerID = ReactComponentTreeHook.getOwnerID(id);
    var parentID = ReactComponentTreeHook.getParentID(id);
    tree[id] = {
      displayName: ReactComponentTreeHook.getDisplayName(id),
      text: ReactComponentTreeHook.getText(id),
      updateCount: ReactComponentTreeHook.getUpdateCount(id),
      childIDs: ReactComponentTreeHook.getChildIDs(id),
      // Text nodes don't have owners but this is close enough.
      ownerID: ownerID || parentID && ReactComponentTreeHook.getOwnerID(parentID) || 0,
      parentID: parentID
    };
    return tree;
  }, {});
}
 
function resetMeasurements() {
  var previousStartTime = currentFlushStartTime;
  var previousMeasurements = currentFlushMeasurements;
  var previousOperations = ReactHostOperationHistoryHook.getHistory();
 
  if (currentFlushNesting === 0) {
    currentFlushStartTime = 0;
    currentFlushMeasurements = [];
    clearHistory();
    return;
  }
 
  if (previousMeasurements.length || previousOperations.length) {
    var registeredIDs = ReactComponentTreeHook.getRegisteredIDs();
    flushHistory.push({
      duration: performanceNow() - previousStartTime,
      measurements: previousMeasurements || [],
      operations: previousOperations || [],
      treeSnapshot: getTreeSnapshot(registeredIDs)
    });
  }
 
  clearHistory();
  currentFlushStartTime = performanceNow();
  currentFlushMeasurements = [];
}
 
function checkDebugID(debugID) {
  var allowRoot = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
 
  if (allowRoot && debugID === 0) {
    return;
  }
  if (!debugID) {
    process.env.NODE_ENV !== 'production' ? warning(false, 'ReactDebugTool: debugID may not be empty.') : void 0;
  }
}
 
function beginLifeCycleTimer(debugID, timerType) {
  if (currentFlushNesting === 0) {
    return;
  }
  if (currentTimerType && !lifeCycleTimerHasWarned) {
    process.env.NODE_ENV !== 'production' ? warning(false, 'There is an internal error in the React performance measurement code. ' + 'Did not expect %s timer to start while %s timer is still in ' + 'progress for %s instance.', timerType, currentTimerType || 'no', debugID === currentTimerDebugID ? 'the same' : 'another') : void 0;
    lifeCycleTimerHasWarned = true;
  }
  currentTimerStartTime = performanceNow();
  currentTimerNestedFlushDuration = 0;
  currentTimerDebugID = debugID;
  currentTimerType = timerType;
}
 
function endLifeCycleTimer(debugID, timerType) {
  if (currentFlushNesting === 0) {
    return;
  }
  if (currentTimerType !== timerType && !lifeCycleTimerHasWarned) {
    process.env.NODE_ENV !== 'production' ? warning(false, 'There is an internal error in the React performance measurement code. ' + 'We did not expect %s timer to stop while %s timer is still in ' + 'progress for %s instance. Please report this as a bug in React.', timerType, currentTimerType || 'no', debugID === currentTimerDebugID ? 'the same' : 'another') : void 0;
    lifeCycleTimerHasWarned = true;
  }
  if (isProfiling) {
    currentFlushMeasurements.push({
      timerType: timerType,
      instanceID: debugID,
      duration: performanceNow() - currentTimerStartTime - currentTimerNestedFlushDuration
    });
  }
  currentTimerStartTime = 0;
  currentTimerNestedFlushDuration = 0;
  currentTimerDebugID = null;
  currentTimerType = null;
}
 
function pauseCurrentLifeCycleTimer() {
  var currentTimer = {
    startTime: currentTimerStartTime,
    nestedFlushStartTime: performanceNow(),
    debugID: currentTimerDebugID,
    timerType: currentTimerType
  };
  lifeCycleTimerStack.push(currentTimer);
  currentTimerStartTime = 0;
  currentTimerNestedFlushDuration = 0;
  currentTimerDebugID = null;
  currentTimerType = null;
}
 
function resumeCurrentLifeCycleTimer() {
  var _lifeCycleTimerStack$ = lifeCycleTimerStack.pop(),
      startTime = _lifeCycleTimerStack$.startTime,
      nestedFlushStartTime = _lifeCycleTimerStack$.nestedFlushStartTime,
      debugID = _lifeCycleTimerStack$.debugID,
      timerType = _lifeCycleTimerStack$.timerType;
 
  var nestedFlushDuration = performanceNow() - nestedFlushStartTime;
  currentTimerStartTime = startTime;
  currentTimerNestedFlushDuration += nestedFlushDuration;
  currentTimerDebugID = debugID;
  currentTimerType = timerType;
}
 
var lastMarkTimeStamp = 0;
var canUsePerformanceMeasure = typeof performance !== 'undefined' && typeof performance.mark === 'function' && typeof performance.clearMarks === 'function' && typeof performance.measure === 'function' && typeof performance.clearMeasures === 'function';
 
function shouldMark(debugID) {
  if (!isProfiling || !canUsePerformanceMeasure) {
    return false;
  }
  var element = ReactComponentTreeHook.getElement(debugID);
  if (element == null || typeof element !== 'object') {
    return false;
  }
  var isHostElement = typeof element.type === 'string';
  if (isHostElement) {
    return false;
  }
  return true;
}
 
function markBegin(debugID, markType) {
  if (!shouldMark(debugID)) {
    return;
  }
 
  var markName = debugID + '::' + markType;
  lastMarkTimeStamp = performanceNow();
  performance.mark(markName);
}
 
function markEnd(debugID, markType) {
  if (!shouldMark(debugID)) {
    return;
  }
 
  var markName = debugID + '::' + markType;
  var displayName = ReactComponentTreeHook.getDisplayName(debugID) || 'Unknown';
 
  // Chrome has an issue of dropping markers recorded too fast:
  // https://bugs.chromium.org/p/chromium/issues/detail?id=640652
  // To work around this, we will not report very small measurements.
  // I determined the magic number by tweaking it back and forth.
  // 0.05ms was enough to prevent the issue, but I set it to 0.1ms to be safe.
  // When the bug is fixed, we can `measure()` unconditionally if we want to.
  var timeStamp = performanceNow();
  if (timeStamp - lastMarkTimeStamp > 0.1) {
    var measurementName = displayName + ' [' + markType + ']';
    performance.measure(measurementName, markName);
  }
 
  performance.clearMarks(markName);
  performance.clearMeasures(measurementName);
}
 
var ReactDebugTool = {
  addHook: function (hook) {
    hooks.push(hook);
  },
  removeHook: function (hook) {
    for (var i = 0; i < hooks.length; i++) {
      if (hooks[i] === hook) {
        hooks.splice(i, 1);
        i--;
      }
    }
  },
  isProfiling: function () {
    return isProfiling;
  },
  beginProfiling: function () {
    if (isProfiling) {
      return;
    }
 
    isProfiling = true;
    flushHistory.length = 0;
    resetMeasurements();
    ReactDebugTool.addHook(ReactHostOperationHistoryHook);
  },
  endProfiling: function () {
    if (!isProfiling) {
      return;
    }
 
    isProfiling = false;
    resetMeasurements();
    ReactDebugTool.removeHook(ReactHostOperationHistoryHook);
  },
  getFlushHistory: function () {
    return flushHistory;
  },
  onBeginFlush: function () {
    currentFlushNesting++;
    resetMeasurements();
    pauseCurrentLifeCycleTimer();
    emitEvent('onBeginFlush');
  },
  onEndFlush: function () {
    resetMeasurements();
    currentFlushNesting--;
    resumeCurrentLifeCycleTimer();
    emitEvent('onEndFlush');
  },
  onBeginLifeCycleTimer: function (debugID, timerType) {
    checkDebugID(debugID);
    emitEvent('onBeginLifeCycleTimer', debugID, timerType);
    markBegin(debugID, timerType);
    beginLifeCycleTimer(debugID, timerType);
  },
  onEndLifeCycleTimer: function (debugID, timerType) {
    checkDebugID(debugID);
    endLifeCycleTimer(debugID, timerType);
    markEnd(debugID, timerType);
    emitEvent('onEndLifeCycleTimer', debugID, timerType);
  },
  onBeginProcessingChildContext: function () {
    emitEvent('onBeginProcessingChildContext');
  },
  onEndProcessingChildContext: function () {
    emitEvent('onEndProcessingChildContext');
  },
  onHostOperation: function (operation) {
    checkDebugID(operation.instanceID);
    emitEvent('onHostOperation', operation);
  },
  onSetState: function () {
    emitEvent('onSetState');
  },
  onSetChildren: function (debugID, childDebugIDs) {
    checkDebugID(debugID);
    childDebugIDs.forEach(checkDebugID);
    emitEvent('onSetChildren', debugID, childDebugIDs);
  },
  onBeforeMountComponent: function (debugID, element, parentDebugID) {
    checkDebugID(debugID);
    checkDebugID(parentDebugID, true);
    emitEvent('onBeforeMountComponent', debugID, element, parentDebugID);
    markBegin(debugID, 'mount');
  },
  onMountComponent: function (debugID) {
    checkDebugID(debugID);
    markEnd(debugID, 'mount');
    emitEvent('onMountComponent', debugID);
  },
  onBeforeUpdateComponent: function (debugID, element) {
    checkDebugID(debugID);
    emitEvent('onBeforeUpdateComponent', debugID, element);
    markBegin(debugID, 'update');
  },
  onUpdateComponent: function (debugID) {
    checkDebugID(debugID);
    markEnd(debugID, 'update');
    emitEvent('onUpdateComponent', debugID);
  },
  onBeforeUnmountComponent: function (debugID) {
    checkDebugID(debugID);
    emitEvent('onBeforeUnmountComponent', debugID);
    markBegin(debugID, 'unmount');
  },
  onUnmountComponent: function (debugID) {
    checkDebugID(debugID);
    markEnd(debugID, 'unmount');
    emitEvent('onUnmountComponent', debugID);
  },
  onTestEvent: function () {
    emitEvent('onTestEvent');
  }
};
 
// TODO remove these when RN/www gets updated
ReactDebugTool.addDevtool = ReactDebugTool.addHook;
ReactDebugTool.removeDevtool = ReactDebugTool.removeHook;
 
ReactDebugTool.addHook(ReactInvalidSetStateWarningHook);
ReactDebugTool.addHook(ReactComponentTreeHook);
var url = ExecutionEnvironment.canUseDOM && window.location.href || '';
Iif (/[?&]react_perf\b/.test(url)) {
  ReactDebugTool.beginProfiling();
}
 
module.exports = ReactDebugTool;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var _assign = require('object-assign');
 
var ReactUpdates = require('./ReactUpdates');
var Transaction = require('./Transaction');
 
var emptyFunction = require('fbjs/lib/emptyFunction');
 
var RESET_BATCHED_UPDATES = {
  initialize: emptyFunction,
  close: function () {
    ReactDefaultBatchingStrategy.isBatchingUpdates = false;
  }
};
 
var FLUSH_BATCHED_UPDATES = {
  initialize: emptyFunction,
  close: ReactUpdates.flushBatchedUpdates.bind(ReactUpdates)
};
 
var TRANSACTION_WRAPPERS = [FLUSH_BATCHED_UPDATES, RESET_BATCHED_UPDATES];
 
function ReactDefaultBatchingStrategyTransaction() {
  this.reinitializeTransaction();
}
 
_assign(ReactDefaultBatchingStrategyTransaction.prototype, Transaction, {
  getTransactionWrappers: function () {
    return TRANSACTION_WRAPPERS;
  }
});
 
var transaction = new ReactDefaultBatchingStrategyTransaction();
 
var ReactDefaultBatchingStrategy = {
  isBatchingUpdates: false,
 
  /**
   * Call the provided function in a context within which calls to `setState`
   * and friends are batched such that components aren't updated unnecessarily.
   */
  batchedUpdates: function (callback, a, b, c, d, e) {
    var alreadyBatchingUpdates = ReactDefaultBatchingStrategy.isBatchingUpdates;
 
    ReactDefaultBatchingStrategy.isBatchingUpdates = true;
 
    // The code is written this way to avoid extra allocations
    if (alreadyBatchingUpdates) {
      return callback(a, b, c, d, e);
    } else {
      return transaction.perform(callback, null, a, b, c, d, e);
    }
  }
};
 
module.exports = ReactDefaultBatchingStrategy;
 

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/**
 * Copyright 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
// The Symbol used to tag the ReactElement type. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
 
var REACT_ELEMENT_TYPE = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.element') || 0xeac7;
 
module.exports = REACT_ELEMENT_TYPE;
 

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/**
 * Copyright 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var emptyComponentFactory;
 
var ReactEmptyComponentInjection = {
  injectEmptyComponentFactory: function (factory) {
    emptyComponentFactory = factory;
  }
};
 
var ReactEmptyComponent = {
  create: function (instantiate) {
    return emptyComponentFactory(instantiate);
  }
};
 
ReactEmptyComponent.injection = ReactEmptyComponentInjection;
 
module.exports = ReactEmptyComponent;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var caughtError = null;
 
/**
 * Call a function while guarding against errors that happens within it.
 *
 * @param {String} name of the guard to use for logging or debugging
 * @param {Function} func The function to invoke
 * @param {*} a First argument
 * @param {*} b Second argument
 */
function invokeGuardedCallback(name, func, a) {
  try {
    func(a);
  } catch (x) {
    if (caughtError === null) {
      caughtError = x;
    }
  }
}
 
var ReactErrorUtils = {
  invokeGuardedCallback: invokeGuardedCallback,
 
  /**
   * Invoked by ReactTestUtils.Simulate so that any errors thrown by the event
   * handler are sure to be rethrown by rethrowCaughtError.
   */
  invokeGuardedCallbackWithCatch: invokeGuardedCallback,
 
  /**
   * During execution of guarded functions we will capture the first error which
   * we will rethrow to be handled by the top level error handler.
   */
  rethrowCaughtError: function () {
    if (caughtError) {
      var error = caughtError;
      caughtError = null;
      throw error;
    }
  }
};
 
Eif (process.env.NODE_ENV !== 'production') {
  /**
   * To help development we can get better devtools integration by simulating a
   * real browser event.
   */
  Iif (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function' && typeof document !== 'undefined' && typeof document.createEvent === 'function') {
    var fakeNode = document.createElement('react');
    ReactErrorUtils.invokeGuardedCallback = function (name, func, a) {
      var boundFunc = func.bind(null, a);
      var evtType = 'react-' + name;
      fakeNode.addEventListener(evtType, boundFunc, false);
      var evt = document.createEvent('Event');
      evt.initEvent(evtType, false, false);
      fakeNode.dispatchEvent(evt);
      fakeNode.removeEventListener(evtType, boundFunc, false);
    };
  }
}
 
module.exports = ReactErrorUtils;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
 
'use strict';
 
var EventPluginHub = require('./EventPluginHub');
 
function runEventQueueInBatch(events) {
  EventPluginHub.enqueueEvents(events);
  EventPluginHub.processEventQueue(false);
}
 
var ReactEventEmitterMixin = {
 
  /**
   * Streams a fired top-level event to `EventPluginHub` where plugins have the
   * opportunity to create `ReactEvent`s to be dispatched.
   */
  handleTopLevel: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var events = EventPluginHub.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);
    runEventQueueInBatch(events);
  }
};
 
module.exports = ReactEventEmitterMixin;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var ReactFeatureFlags = {
  // When true, call console.time() before and .timeEnd() after each top-level
  // render (both initial renders and updates). Useful when looking at prod-mode
  // timeline profiles in Chrome, for example.
  logTopLevelRenders: false
};
 
module.exports = ReactFeatureFlags;
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var ReactTypeOfWork = require('./ReactTypeOfWork');
var IndeterminateComponent = ReactTypeOfWork.IndeterminateComponent,
    ClassComponent = ReactTypeOfWork.ClassComponent,
    HostContainer = ReactTypeOfWork.HostContainer,
    HostComponent = ReactTypeOfWork.HostComponent,
    CoroutineComponent = ReactTypeOfWork.CoroutineComponent,
    YieldComponent = ReactTypeOfWork.YieldComponent;
 
var _require = require('./ReactPriorityLevel'),
    NoWork = _require.NoWork;
 
// An Instance is shared between all versions of a component. We can easily
// break this out into a separate object to avoid copying so much to the
// alternate versions of the tree. We put this on a single object for now to
// minimize the number of objects created during the initial render.
 
 
// A Fiber is work on a Component that needs to be done or was done. There can
// be more than one per component.
 
 
// This is a constructor of a POJO instead of a constructor function for a few
// reasons:
// 1) Nobody should add any instance methods on this. Instance methods can be
//    more difficult to predict when they get optimized and they are almost
//    never inlined properly in static compilers.
// 2) Nobody should rely on `instanceof Fiber` for type testing. We should
//    always know when it is a fiber.
// 3) We can easily go from a createFiber call to calling a constructor if that
//    is faster. The opposite is not true.
// 4) We might want to experiment with using numeric keys since they are easier
//    to optimize in a non-JIT environment.
// 5) It should be easy to port this to a C struct and keep a C implementation
//    compatible.
var createFiber = function (tag, key) {
  return {
 
    // Instance
 
    tag: tag,
 
    key: key,
 
    type: null,
 
    stateNode: null,
 
    // Fiber
 
    'return': null,
 
    child: null,
    sibling: null,
 
    ref: null,
 
    pendingProps: null,
    memoizedProps: null,
    updateQueue: null,
    memoizedState: null,
    callbackList: null,
    output: null,
 
    nextEffect: null,
    firstEffect: null,
    lastEffect: null,
 
    pendingWorkPriority: NoWork,
    progressedPriority: NoWork,
    progressedChild: null,
 
    alternate: null
 
  };
};
 
function shouldConstruct(Component) {
  return !!(Component.prototype && Component.prototype.isReactComponent);
}
 
// This is used to create an alternate fiber to do work on.
// TODO: Rename to createWorkInProgressFiber or something like that.
exports.cloneFiber = function (fiber, priorityLevel) {
  // We clone to get a work in progress. That means that this fiber is the
  // current. To make it safe to reuse that fiber later on as work in progress
  // we need to reset its work in progress flag now. We don't have an
  // opportunity to do this earlier since we don't traverse the tree when
  // the work in progress tree becomes the current tree.
  // fiber.progressedPriority = NoWork;
  // fiber.progressedChild = null;
 
  // We use a double buffering pooling technique because we know that we'll only
  // ever need at most two versions of a tree. We pool the "other" unused node
  // that we're free to reuse. This is lazily created to avoid allocating extra
  // objects for things that are never updated. It also allow us to reclaim the
  // extra memory if needed.
  var alt = fiber.alternate;
  if (alt) {
    // Whenever we clone, we do so to get a new work in progress.
    // This ensures that we've reset these in the new tree.
    alt.nextEffect = null;
    alt.firstEffect = null;
    alt.lastEffect = null;
  } else {
    // This should not have an alternate already
    alt = createFiber(fiber.tag, fiber.key);
    alt.type = fiber.type;
 
    alt.progressedChild = fiber.progressedChild;
    alt.progressedPriority = fiber.progressedPriority;
 
    alt.alternate = fiber;
    fiber.alternate = alt;
  }
 
  alt.stateNode = fiber.stateNode;
  alt.child = fiber.child;
  alt.sibling = fiber.sibling; // This should always be overridden. TODO: null
  alt.ref = fiber.ref;
  // pendingProps is here for symmetry but is unnecessary in practice for now.
  // TODO: Pass in the new pendingProps as an argument maybe?
  alt.pendingProps = fiber.pendingProps;
  alt.updateQueue = fiber.updateQueue;
  alt.callbackList = fiber.callbackList;
  alt.pendingWorkPriority = priorityLevel;
 
  alt.memoizedProps = fiber.memoizedProps;
  alt.output = fiber.output;
 
  return alt;
};
 
exports.createHostContainerFiber = function () {
  var fiber = createFiber(HostContainer, null);
  return fiber;
};
 
exports.createFiberFromElement = function (element, priorityLevel) {
  // $FlowFixMe: ReactElement.key is currently defined as ?string but should be defined as null | string in Flow.
  var fiber = createFiberFromElementType(element.type, element.key);
  fiber.pendingProps = element.props;
  fiber.pendingWorkPriority = priorityLevel;
  return fiber;
};
 
function createFiberFromElementType(type, key) {
  var fiber = void 0;
  if (typeof type === 'function') {
    fiber = shouldConstruct(type) ? createFiber(ClassComponent, key) : createFiber(IndeterminateComponent, key);
    fiber.type = type;
  } else if (typeof type === 'string') {
    fiber = createFiber(HostComponent, key);
    fiber.type = type;
  } else if (typeof type === 'object' && type !== null) {
    // Currently assumed to be a continuation and therefore is a fiber already.
    fiber = type;
  } else {
    throw new Error('Unknown component type: ' + typeof type);
  }
  return fiber;
}
 
exports.createFiberFromElementType = createFiberFromElementType;
 
exports.createFiberFromCoroutine = function (coroutine, priorityLevel) {
  var fiber = createFiber(CoroutineComponent, coroutine.key);
  fiber.type = coroutine.handler;
  fiber.pendingProps = coroutine;
  fiber.pendingWorkPriority = priorityLevel;
  return fiber;
};
 
exports.createFiberFromYield = function (yieldNode, priorityLevel) {
  var fiber = createFiber(YieldComponent, yieldNode.key);
  fiber.pendingProps = {};
  return fiber;
};
 

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/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
 
'use strict';
 
var _require = require('./ReactChildFiber'),
    reconcileChildFibers = _require.reconcileChildFibers,
    reconcileChildFibersInPlace = _require.reconcileChildFibersInPlace,
    cloneChildFibers = _require.cloneChildFibers;
 
var _require2 = require('./ReactPriorityLevel'),
    LowPriority = _require2.LowPriority;
 
var ReactTypeOfWork = require('./ReactTypeOfWork');
var IndeterminateComponent = ReactTypeOfWork.IndeterminateComponent,
    FunctionalComponent = ReactTypeOfWork.FunctionalComponent,
    ClassComponent = ReactTypeOfWork.ClassComponent,
    HostContainer = ReactTypeOfWork.HostContainer,
    HostComponent = ReactTypeOfWork.HostComponent,
    CoroutineComponent = ReactTypeOfWork.CoroutineComponent,
    CoroutineHandlerPhase = ReactTypeOfWork.CoroutineHandlerPhase,
    YieldComponent = ReactTypeOfWork.YieldComponent;
 
var _require3 = require('./ReactPriorityLevel'),
    NoWork = _require3.NoWork,
    OffscreenPriority = _require3.OffscreenPriority;
 
var _require4 = require('./ReactFiberUpdateQueue'),
    createUpdateQueue = _require4.createUpdateQueue,
    addToQueue = _require4.addToQueue,
    addCallbackToQueue = _require4.addCallbackToQueue,
    mergeUpdateQueue = _require4.mergeUpdateQueue;
 
var ReactInstanceMap = require('./ReactInstanceMap');
 
module.exports = function (config, getScheduler) {
 
  function markChildAsProgressed(current, workInProgress, priorityLevel) {
    // We now have clones. Let's store them as the currently progressed work.
    workInProgress.progressedChild = workInProgress.child;
    workInProgress.progressedPriority = priorityLevel;
    if (current) {
      // We also store it on the current. When the alternate swaps in we can
      // continue from this point.
      current.progressedChild = workInProgress.progressedChild;
      current.progressedPriority = workInProgress.progressedPriority;
    }
  }
 
  function reconcileChildren(current, workInProgress, nextChildren) {
    var priorityLevel = workInProgress.pendingWorkPriority;
    reconcileChildrenAtPriority(current, workInProgress, nextChildren, priorityLevel);
  }
 
  function reconcileChildrenAtPriority(current, workInProgress, nextChildren, priorityLevel) {
    // At this point any memoization is no longer valid since we'll have changed
    // the children.
    workInProgress.memoizedProps = null;
    if (current && current.child === workInProgress.child) {
      // If the current child is the same as the work in progress, it means that
      // we haven't yet started any work on these children. Therefore, we use
      // the clone algorithm to create a copy of all the current children.
      workInProgress.child = reconcileChildFibers(workInProgress, workInProgress.child, nextChildren, priorityLevel);
    } else {
      // If, on the other hand, we don't have a current fiber or if it is
      // already using a clone, that means we've already begun some work on this
      // tree and we can continue where we left off by reconciling against the
      // existing children.
      workInProgress.child = reconcileChildFibersInPlace(workInProgress, workInProgress.child, nextChildren, priorityLevel);
    }
    markChildAsProgressed(current, workInProgress, priorityLevel);
  }
 
  function updateFunctionalComponent(current, workInProgress) {
    var fn = workInProgress.type;
    var props = workInProgress.pendingProps;
 
    // TODO: Disable this before release, since it is not part of the public API
    // I use this for testing to compare the relative overhead of classes.
    if (typeof fn.shouldComponentUpdate === 'function') {
      if (workInProgress.memoizedProps !== null) {
        if (!fn.shouldComponentUpdate(workInProgress.memoizedProps, props)) {
          return bailoutOnAlreadyFinishedWork(current, workInProgress);
        }
      }
    }
 
    var nextChildren = fn(props);
    reconcileChildren(current, workInProgress, nextChildren);
    return workInProgress.child;
  }
 
  function scheduleUpdate(fiber, updateQueue, priorityLevel) {
    var _getScheduler = getScheduler(),
        scheduleDeferredWork = _getScheduler.scheduleDeferredWork;
 
    fiber.updateQueue = updateQueue;
    // Schedule update on the alternate as well, since we don't know which tree
    // is current.
    if (fiber.alternate) {
      fiber.alternate.updateQueue = updateQueue;
    }
    while (true) {
      if (fiber.pendingWorkPriority === NoWork || fiber.pendingWorkPriority >= priorityLevel) {
        fiber.pendingWorkPriority = priorityLevel;
      }
      if (fiber.alternate) {
        if (fiber.alternate.pendingWorkPriority === NoWork || fiber.alternate.pendingWorkPriority >= priorityLevel) {
          fiber.alternate.pendingWorkPriority = priorityLevel;
        }
      }
      // Duck type root
      if (fiber.stateNode && fiber.stateNode.containerInfo) {
        var root = fiber.stateNode;
        scheduleDeferredWork(root, priorityLevel);
        return;
      }
      if (!fiber['return']) {
        throw new Error('No root!');
      }
      fiber = fiber['return'];
    }
  }
 
  // Class component state updater
  var updater = {
    enqueueSetState: function (instance, partialState) {
      var fiber = ReactInstanceMap.get(instance);
      var updateQueue = fiber.updateQueue ? addToQueue(fiber.updateQueue, partialState) : createUpdateQueue(partialState);
      scheduleUpdate(fiber, updateQueue, LowPriority);
    },
    enqueueReplaceState: function (instance, state) {
      var fiber = ReactInstanceMap.get(instance);
      var updateQueue = createUpdateQueue(state);
      updateQueue.isReplace = true;
      scheduleUpdate(fiber, updateQueue, LowPriority);
    },
    enqueueForceUpdate: function (instance) {
      var fiber = ReactInstanceMap.get(instance);
      var updateQueue = fiber.updateQueue || createUpdateQueue(null);
      updateQueue.isForced = true;
      scheduleUpdate(fiber, updateQueue, LowPriority);
    },
    enqueueCallback: function (instance, callback) {
      var fiber = ReactInstanceMap.get(instance);
      var updateQueue = fiber.updateQueue ? fiber.updateQueue : createUpdateQueue(null);
      addCallbackToQueue(updateQueue, callback);
      fiber.updateQueue = updateQueue;
      if (fiber.alternate) {
        fiber.alternate.updateQueue = updateQueue;
      }
    }
  };
 
  function updateClassComponent(current, workInProgress) {
    // A class component update is the result of either new props or new state.
    // Account for the possibly of missing pending props by falling back to the
    // memoized props.
    var props = workInProgress.pendingProps;
    if (!props && current) {
      props = current.memoizedProps;
    }
    // Compute the state using the memoized state and the update queue.
    var updateQueue = workInProgress.updateQueue;
    var previousState = current ? current.memoizedState : null;
    var state = updateQueue ? mergeUpdateQueue(updateQueue, previousState, props) : previousState;
 
    var instance = workInProgress.stateNode;
    if (!instance) {
      var ctor = workInProgress.type;
      workInProgress.stateNode = instance = new ctor(props);
      state = instance.state || null;
      // The initial state must be added to the update queue in case
      // setState is called before the initial render.
      if (state !== null) {
        workInProgress.updateQueue = createUpdateQueue(state);
      }
      // The instance needs access to the fiber so that it can schedule updates
      ReactInstanceMap.set(instance, workInProgress);
      instance.updater = updater;
    } else if (typeof instance.shouldComponentUpdate === 'function' && !(updateQueue && updateQueue.isForced)) {
      if (workInProgress.memoizedProps !== null) {
        // Reset the props, in case this is a ping-pong case rather than a
        // completed update case. For the completed update case, the instance
        // props will already be the memoizedProps.
        instance.props = workInProgress.memoizedProps;
        instance.state = workInProgress.memoizedState;
        if (!instance.shouldComponentUpdate(props, state)) {
          return bailoutOnAlreadyFinishedWork(current, workInProgress);
        }
      }
    }
 
    instance.props = props;
    instance.state = state;
    var nextChildren = instance.render();
    reconcileChildren(current, workInProgress, nextChildren);
 
    return workInProgress.child;
  }
 
  function updateHostComponent(current, workInProgress) {
    var nextChildren = workInProgress.pendingProps.children;
    if (workInProgress.pendingProps.hidden && workInProgress.pendingWorkPriority !== OffscreenPriority) {
      // If this host component is hidden, we can bail out on the children.
      // We'll rerender the children later at the lower priority.
 
      // It is unfortunate that we have to do the reconciliation of these
      // children already since that will add them to the tree even though
      // they are not actually done yet. If this is a large set it is also
      // confusing that this takes time to do right now instead of later.
 
      if (workInProgress.progressedPriority === OffscreenPriority) {
        // If we already made some progress on the offscreen priority before,
        // then we should continue from where we left off.
        workInProgress.child = workInProgress.progressedChild;
      }
 
      // Reconcile the children and stash them for later work.
      reconcileChildrenAtPriority(current, workInProgress, nextChildren, OffscreenPriority);
      workInProgress.child = current ? current.child : null;
      // Abort and don't process children yet.
      return null;
    } else {
      reconcileChildren(current, workInProgress, nextChildren);
      return workInProgress.child;
    }
  }
 
  function mountIndeterminateComponent(current, workInProgress) {
    var fn = workInProgress.type;
    var props = workInProgress.pendingProps;
    var value = fn(props);
    if (typeof value === 'object' && value && typeof value.render === 'function') {
      // Proceed under the assumption that this is a class instance
      workInProgress.tag = ClassComponent;
      if (current) {
        current.tag = ClassComponent;
      }
      value = value.render();
    } else {
      // Proceed under the assumption that this is a functional component
      workInProgress.tag = FunctionalComponent;
      if (current) {
        current.tag = FunctionalComponent;
      }
    }
    reconcileChildren(current, workInProgress, value);
    return workInProgress.child;
  }
 
  function updateCoroutineComponent(current, workInProgress) {
    var coroutine = workInProgress.pendingProps;
    if (!coroutine) {
      throw new Error('Should be resolved by now');
    }
    reconcileChildren(current, workInProgress, coroutine.children);
  }
 
  /*
  function reuseChildrenEffects(returnFiber : Fiber, firstChild : Fiber) {
    let child = firstChild;
    do {
      // Ensure that the first and last effect of the parent corresponds
      // to the children's first and last effect.
      if (!returnFiber.firstEffect) {
        returnFiber.firstEffect = child.firstEffect;
      }
      if (child.lastEffect) {
        if (returnFiber.lastEffect) {
          returnFiber.lastEffect.nextEffect = child.firstEffect;
        }
        returnFiber.lastEffect = child.lastEffect;
      }
    } while (child = child.sibling);
  }
  */
 
  function bailoutOnAlreadyFinishedWork(current, workInProgress) {
    var priorityLevel = workInProgress.pendingWorkPriority;
 
    // TODO: We should ideally be able to bail out early if the children have no
    // more work to do. However, since we don't have a separation of this
    // Fiber's priority and its children yet - we don't know without doing lots
    // of the same work we do anyway. Once we have that separation we can just
    // bail out here if the children has no more work at this priority level.
    // if (workInProgress.priorityOfChildren <= priorityLevel) {
    //   // If there are side-effects in these children that have not yet been
    //   // committed we need to ensure that they get properly transferred up.
    //   if (current && current.child !== workInProgress.child) {
    //     reuseChildrenEffects(workInProgress, child);
    //   }
    //   return null;
    // }
 
    cloneChildFibers(current, workInProgress);
    markChildAsProgressed(current, workInProgress, priorityLevel);
    return workInProgress.child;
  }
 
  function bailoutOnLowPriority(current, workInProgress) {
    if (current) {
      workInProgress.child = current.child;
      workInProgress.memoizedProps = current.memoizedProps;
      workInProgress.output = current.output;
    }
    return null;
  }
 
  function beginWork(current, workInProgress, priorityLevel) {
    if (workInProgress.pendingWorkPriority === NoWork || workInProgress.pendingWorkPriority > priorityLevel) {
      return bailoutOnLowPriority(current, workInProgress);
    }
 
    if (workInProgress.progressedPriority === priorityLevel) {
      // If we have progressed work on this priority level already, we can
      // proceed this that as the child.
      workInProgress.child = workInProgress.progressedChild;
    }
 
    if ((workInProgress.pendingProps === null || workInProgress.memoizedProps !== null && workInProgress.pendingProps === workInProgress.memoizedProps) && workInProgress.updateQueue === null) {
      return bailoutOnAlreadyFinishedWork(current, workInProgress);
    }
 
    switch (workInProgress.tag) {
      case IndeterminateComponent:
        return mountIndeterminateComponent(current, workInProgress);
      case FunctionalComponent:
        return updateFunctionalComponent(current, workInProgress);
      case ClassComponent:
        return updateClassComponent(current, workInProgress);
      case HostContainer:
        reconcileChildren(current, workInProgress, workInProgress.pendingProps);
        // A yield component is just a placeholder, we can just run through the
        // next one immediately.
        if (workInProgress.child) {
          return beginWork(workInProgress.child.alternate, workInProgress.child, priorityLevel);
        }
        return null;
      case HostComponent:
        if (workInProgress.stateNode && typeof config.beginUpdate === 'function') {
          config.beginUpdate(workInProgress.stateNode);
        }
        return updateHostComponent(current, workInProgress);
      case CoroutineHandlerPhase:
        // This is a restart. Reset the tag to the initial phase.
        workInProgress.tag = CoroutineComponent;
      // Intentionally fall through since this is now the same.
      case CoroutineComponent:
        updateCoroutineComponent(current, workInProgress);
        // This doesn't take arbitrary time so we could synchronously just begin
        // eagerly do the work of workInProgress.child as an optimization.
        if (workInProgress.child) {
          return beginWork(workInProgress.child.alternate, workInProgress.child, priorityLevel);
        }
        return workInProgress.child;
      case YieldComponent:
        // A yield component is just a placeholder, we can just run through the
        // next one immediately.
        if (workInProgress.sibling) {
          return beginWork(workInProgress.sibling.alternate, workInProgress.sibling, priorityLevel);
        }
        return null;
      default:
        throw new Error('Unknown unit of work tag');
    }
  }
 
  return {
    beginWork: beginWork
  };
};